diff --git a/backend/src/main/java/es/adeptusminiaturium/backend/model/Media.java b/backend/src/main/java/es/adeptusminiaturium/backend/model/Media.java
index 5a651d7..f6a9e04 100644
--- a/backend/src/main/java/es/adeptusminiaturium/backend/model/Media.java
+++ b/backend/src/main/java/es/adeptusminiaturium/backend/model/Media.java
@@ -1,4 +1,86 @@
 package es.adeptusminiaturium.backend.model;
 
+import com.fasterxml.jackson.annotation.JsonManagedReference;
+import es.adeptusminiaturium.backend.enums.MediaType;
+import jakarta.persistence.*;
+import org.hibernate.annotations.CreationTimestamp;
+
+import java.time.LocalDateTime;
+import java.time.LocalDateTime;
+
+@Entity
+@Table(name = "media")
 public class Media {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    @Column(name = "media_id")
+    private Long mediaId;
+
+    @JsonManagedReference
+    @ManyToOne(fetch = FetchType.LAZY)
+    @JoinColumn(name = "post_id", nullable = false)
+    private Post post;
+
+    @Enumerated(EnumType.ORDINAL)
+    @Column(name = "media_type", nullable = false)
+    private MediaType mediaType = MediaType.IMAGE;
+
+    @Column(nullable = false, length = 512)
+    private String url;
+
+    @Column(nullable = false)
+    private Integer position = 0;
+
+    @CreationTimestamp
+    @Column(name = "created_at", insertable = false, updatable = false)
+    private LocalDateTime createdAt;
+
+    public Long getMediaId() {
+        return mediaId;
+    }
+
+    public void setMediaId(Long mediaId) {
+        this.mediaId = mediaId;
+    }
+
+    public Post getPost() {
+        return post;
+    }
+
+    public void setPost(Post post) {
+        this.post = post;
+    }
+
+    public MediaType getMediaType() {
+        return mediaType;
+    }
+
+    public void setMediaType(MediaType mediaType) {
+        this.mediaType = mediaType;
+    }
+
+    public String getUrl() {
+        return url;
+    }
+
+    public void setUrl(String url) {
+        this.url = url;
+    }
+
+    public Integer getPosition() {
+        return position;
+    }
+
+    public void setPosition(Integer position) {
+        this.position = position;
+    }
+
+    public LocalDateTime getCreatedAt() {
+        return createdAt;
+    }
+
+    public void setCreatedAt(LocalDateTime createdAt) {
+        this.createdAt = createdAt;
+    }
 }
diff --git a/backend/src/main/java/es/adeptusminiaturium/backend/model/Post.java b/backend/src/main/java/es/adeptusminiaturium/backend/model/Post.java
index abe1325..7f354ee 100644
--- a/backend/src/main/java/es/adeptusminiaturium/backend/model/Post.java
+++ b/backend/src/main/java/es/adeptusminiaturium/backend/model/Post.java
@@ -1,4 +1,143 @@
 package es.adeptusminiaturium.backend.model;
 
+import com.fasterxml.jackson.annotation.JsonManagedReference;
+import es.adeptusminiaturium.backend.enums.PostStatus;
+import jakarta.persistence.*;
+import org.hibernate.annotations.CreationTimestamp;
+import org.hibernate.annotations.UpdateTimestamp;
+
+import java.time.LocalDateTime;
+import java.util.List;
+
+@Entity
+@Table(name = "posts")
 public class Post {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    @Column(name = "post_id")
+    private Long postId;
+
+    @JsonManagedReference
+    @ManyToOne(fetch = FetchType.LAZY)
+    @JoinColumn(name = "author_id", nullable = false)
+    private User author;
+
+    @Column(nullable = false)
+    private String title;
+
+    @Column(columnDefinition = "TEXT")
+    private String body;
+
+    @Column(columnDefinition = "TEXT")
+    private String hashtags;
+
+    @Enumerated(EnumType.ORDINAL)
+    @Column(nullable = false)
+    private PostStatus status = PostStatus.DRAFT;
+
+    @Column(name = "published_at")
+    private LocalDateTime publishedAt;
+
+    @CreationTimestamp
+    @Column(name = "created_at", insertable = false, updatable = false)
+    private LocalDateTime createdAt;
+
+    @UpdateTimestamp
+    @Column(name = "updated_at", insertable = false, updatable = false)
+    private LocalDateTime updatedAt;
+
+    @OneToMany(mappedBy = "post", cascade = CascadeType.ALL, orphanRemoval = true)
+    private List<Media> media;
+
+    @OneToMany(mappedBy = "post", cascade = CascadeType.ALL, orphanRemoval = true)
+    private List<Publication> publications;
+
+    public Long getPostId() {
+        return postId;
+    }
+
+    public void setPostId(Long postId) {
+        this.postId = postId;
+    }
+
+    public User getAuthor() {
+        return author;
+    }
+
+    public void setAuthor(User author) {
+        this.author = author;
+    }
+
+    public String getTitle() {
+        return title;
+    }
+
+    public void setTitle(String title) {
+        this.title = title;
+    }
+
+    public String getBody() {
+        return body;
+    }
+
+    public void setBody(String body) {
+        this.body = body;
+    }
+
+    public String getHashtags() {
+        return hashtags;
+    }
+
+    public void setHashtags(String hashtags) {
+        this.hashtags = hashtags;
+    }
+
+    public PostStatus getStatus() {
+        return status;
+    }
+
+    public void setStatus(PostStatus status) {
+        this.status = status;
+    }
+
+    public LocalDateTime getPublishedAt() {
+        return publishedAt;
+    }
+
+    public void setPublishedAt(LocalDateTime publishedAt) {
+        this.publishedAt = publishedAt;
+    }
+
+    public LocalDateTime getCreatedAt() {
+        return createdAt;
+    }
+
+    public void setCreatedAt(LocalDateTime createdAt) {
+        this.createdAt = createdAt;
+    }
+
+    public LocalDateTime getUpdatedAt() {
+        return updatedAt;
+    }
+
+    public void setUpdatedAt(LocalDateTime updatedAt) {
+        this.updatedAt = updatedAt;
+    }
+
+    public List<Media> getMedia() {
+        return media;
+    }
+
+    public void setMedia(List<Media> media) {
+        this.media = media;
+    }
+
+    public List<Publication> getPublications() {
+        return publications;
+    }
+
+    public void setPublications(List<Publication> publications) {
+        this.publications = publications;
+    }
 }
diff --git a/backend/src/main/java/es/adeptusminiaturium/backend/model/Publication.java b/backend/src/main/java/es/adeptusminiaturium/backend/model/Publication.java
index 487e5c5..85fa64f 100644
--- a/backend/src/main/java/es/adeptusminiaturium/backend/model/Publication.java
+++ b/backend/src/main/java/es/adeptusminiaturium/backend/model/Publication.java
@@ -1,4 +1,111 @@
 package es.adeptusminiaturium.backend.model;
 
+import com.fasterxml.jackson.annotation.JsonManagedReference;
+import es.adeptusminiaturium.backend.enums.Platform;
+import es.adeptusminiaturium.backend.enums.PublicationStatus;
+import jakarta.persistence.*;
+import org.hibernate.annotations.CreationTimestamp;
+
+import java.time.LocalDateTime;
+
+@Entity
+@Table(
+        name = "publications",
+        uniqueConstraints = @UniqueConstraint(columnNames = {"post_id", "platform"})
+)
 public class Publication {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    @Column(name = "publication_id")
+    private Long publicationId;
+
+    @JsonManagedReference
+    @ManyToOne(fetch = FetchType.LAZY)
+    @JoinColumn(name = "post_id", nullable = false)
+    private Post post;
+
+    @Enumerated(EnumType.ORDINAL)
+    @Column(nullable = false)
+    private Platform platform;
+
+    private String externalId;
+
+    @Enumerated(EnumType.ORDINAL)
+    @Column(nullable = false)
+    private PublicationStatus status = PublicationStatus.PENDING;
+
+    @Column(name = "published_at")
+    private LocalDateTime publishedAt;
+
+    @Column(columnDefinition = "TEXT")
+    private String errorMessage;
+
+    @CreationTimestamp
+    @Column(name = "created_at", insertable = false, updatable = false)
+    private LocalDateTime createdAt;
+
+    public Long getPublicationId() {
+        return publicationId;
+    }
+
+    public void setPublicationId(Long publicationId) {
+        this.publicationId = publicationId;
+    }
+
+    public Post getPost() {
+        return post;
+    }
+
+    public void setPost(Post post) {
+        this.post = post;
+    }
+
+    public Platform getPlatform() {
+        return platform;
+    }
+
+    public void setPlatform(Platform platform) {
+        this.platform = platform;
+    }
+
+    public String getExternalId() {
+        return externalId;
+    }
+
+    public void setExternalId(String externalId) {
+        this.externalId = externalId;
+    }
+
+    public PublicationStatus getStatus() {
+        return status;
+    }
+
+    public void setStatus(PublicationStatus status) {
+        this.status = status;
+    }
+
+    public LocalDateTime getPublishedAt() {
+        return publishedAt;
+    }
+
+    public void setPublishedAt(LocalDateTime publishedAt) {
+        this.publishedAt = publishedAt;
+    }
+
+    public String getErrorMessage() {
+        return errorMessage;
+    }
+
+    public void setErrorMessage(String errorMessage) {
+        this.errorMessage = errorMessage;
+    }
+
+    public LocalDateTime getCreatedAt() {
+        return createdAt;
+    }
+
+    public void setCreatedAt(LocalDateTime createdAt) {
+        this.createdAt = createdAt;
+    }
 }
diff --git a/backend/src/main/java/es/adeptusminiaturium/backend/model/User.java b/backend/src/main/java/es/adeptusminiaturium/backend/model/User.java
index a189afb..3054c68 100644
--- a/backend/src/main/java/es/adeptusminiaturium/backend/model/User.java
+++ b/backend/src/main/java/es/adeptusminiaturium/backend/model/User.java
@@ -1,4 +1,118 @@
 package es.adeptusminiaturium.backend.model;
 
+import es.adeptusminiaturium.backend.enums.UserRole;
+import es.adeptusminiaturium.backend.enums.UserStatus;
+import jakarta.persistence.*;
+import org.hibernate.annotations.CreationTimestamp;
+import org.hibernate.annotations.UpdateTimestamp;
+
+import java.time.LocalDateTime;
+import java.util.UUID;
+
+@Entity
+@Table(name = "users")
 public class User {
+
+    @Id
+    @Column(name = "user_id", nullable = false, updatable = false)
+    private UUID userId;
+
+    @Column(name = "display_name")
+    private String displayName;
+
+    @Column(name = "user_name", nullable = false, unique = true)
+    private String userName;
+
+    @Column(nullable = false)
+    private String password;
+
+    private String avatar;
+
+    @Enumerated(EnumType.ORDINAL)
+    @Column(nullable = false)
+    private UserRole role = UserRole.USER;
+
+    @Enumerated(EnumType.ORDINAL)
+    @Column(nullable = false)
+    private UserStatus status = UserStatus.ACTIVE;
+
+    @CreationTimestamp
+    @Column(name = "created_at", insertable = false, updatable = false)
+    private LocalDateTime createdAt;
+
+    @UpdateTimestamp
+    @Column(name = "updated_at", insertable = false, updatable = false)
+    private LocalDateTime updatedAt;
+
+    public UUID getUserId() {
+        return userId;
+    }
+
+    public void setUserId(UUID userId) {
+        this.userId = userId;
+    }
+
+    public String getDisplayName() {
+        return displayName;
+    }
+
+    public void setDisplayName(String displayName) {
+        this.displayName = displayName;
+    }
+
+    public String getUserName() {
+        return userName;
+    }
+
+    public void setUserName(String userName) {
+        this.userName = userName;
+    }
+
+    public String getPassword() {
+        return password;
+    }
+
+    public void setPassword(String password) {
+        this.password = password;
+    }
+
+    public String getAvatar() {
+        return avatar;
+    }
+
+    public void setAvatar(String avatar) {
+        this.avatar = avatar;
+    }
+
+    public UserRole getRole() {
+        return role;
+    }
+
+    public void setRole(UserRole role) {
+        this.role = role;
+    }
+
+    public UserStatus getStatus() {
+        return status;
+    }
+
+    public void setStatus(UserStatus status) {
+        this.status = status;
+    }
+
+    public LocalDateTime getCreatedAt() {
+        return createdAt;
+    }
+
+    public void setCreatedAt(LocalDateTime createdAt) {
+        this.createdAt = createdAt;
+    }
+
+    public LocalDateTime getUpdatedAt() {
+        return updatedAt;
+    }
+
+    public void setUpdatedAt(LocalDateTime updatedAt) {
+        this.updatedAt = updatedAt;
+    }
 }
diff --git a/backend/src/main/resources/application-dev.yaml b/backend/src/main/resources/application-dev.yaml
index 9d618c1..b4c96ee 100644
--- a/backend/src/main/resources/application-dev.yaml
+++ b/backend/src/main/resources/application-dev.yaml
@@ -1,9 +1,9 @@
 server:
   port: 8080
-  servlet:
-    context-path: /v1/
 
 spring:
+  jpa:
+    show-sql: true
   datasource:
     url: jdbc:mariadb://localhost:3306/miniaturium
     username: admin
diff --git a/backend/src/main/resources/application-prod.yaml b/backend/src/main/resources/application-prod.yaml
index 87c6604..40b1330 100644
--- a/backend/src/main/resources/application-prod.yaml
+++ b/backend/src/main/resources/application-prod.yaml
@@ -1,7 +1,5 @@
 server:
   port: 8080
-  servlet:
-    context-path: /v1/
 
 spring:
   datasource:
diff --git a/frontend/src/components/Header.jsx b/frontend/src/components/Header.jsx
index 96a2f86..8186c49 100644
--- a/frontend/src/components/Header.jsx
+++ b/frontend/src/components/Header.jsx
@@ -5,7 +5,13 @@ const Header = () => {
   const { t } = useTranslation();
 
   return (
-    <header className="py-5 text-center position-relative">
+    <header className="imperial-header py-5 text-center position-relative">
+      <img
+        src="/images/purity.png"
+        alt="Purity Seal"
+        className="purity-seal left"
+      />
+
       <h1 className="mb-2">Adeptus Miniaturium</h1>
       <p className="m-0">{t("header.subtitle")}</p>
     </header>
diff --git a/frontend/src/css/Header.css b/frontend/src/css/Header.css
index 21bdc65..8a8e410 100644
--- a/frontend/src/css/Header.css
+++ b/frontend/src/css/Header.css
@@ -6,6 +6,28 @@ header {
     box-shadow: 0 10px 30px rgba(0,0,0,0.9);
 }
 
+.imperial-header {
+    overflow: visible;
+    z-index: 1000;
+}
+
+.purity-seal {
+    position: absolute;
+    top: 5px;
+    width: 196px;
+    z-index: 10;
+    pointer-events: none;
+}
+
+.purity-seal.left {
+    left: 8%;
+}
+
+.purity-seal.right {
+    right: 5%;
+    transform: rotate(10deg);
+}
+
 header h1 {
     font-family: 'Cinzel', serif;
     font-size: 3.5rem;