diff --git a/banner/types/Banner.ts b/banner/types/Banner.ts
new file mode 100644
index 0000000..e1f1698
--- /dev/null
+++ b/banner/types/Banner.ts
@@ -0,0 +1,8 @@
+// Copyright (c) 2024. Sendanor <info@sendanor.fi>. All rights reserved.
+
+import { Entity } from "../../entities/types/Entity";
+import { BannerDTO } from "./BannerDTO";
+
+export interface Banner extends Entity<BannerDTO> {
+
+}
diff --git a/banner/types/BannerModel.ts b/banner/types/BannerDTO.ts
similarity index 90%
rename from banner/types/BannerModel.ts
rename to banner/types/BannerDTO.ts
index 54ba0a0..d681380 100644
--- a/banner/types/BannerModel.ts
+++ b/banner/types/BannerDTO.ts
@@ -1,11 +1,12 @@
 // Copyright (c) 2021-2024. Sendanor <info@sendanor.fi>. All rights reserved.
 
+import { DTO } from "../../entities/types/DTO";
 import { BannerLanguage } from "./BannerLanguage";
 import { BannerLocation } from "./BannerLocation";
 import { BannerState } from "./BannerState";
 import { BannerType } from "./BannerType";
 
-export interface BannerModel {
+export interface BannerDTO extends DTO {
 
     /**
      * The state of the banner
@@ -41,8 +42,8 @@ export interface BannerModel {
     readonly imageUrl     : string;
     readonly imageAlt     : string;
 
-    readonly languages   ?: BannerLanguage[];
-    readonly locations   ?: BannerLocation[];
+    readonly languages   ?: readonly BannerLanguage[];
+    readonly locations   ?: readonly BannerLocation[];
 
     readonly draftTime   ?: string;
     readonly startTime   ?: string;
diff --git a/banner/types/BannerEntity.ts b/banner/types/BannerEntity.ts
new file mode 100644
index 0000000..6df49ee
--- /dev/null
+++ b/banner/types/BannerEntity.ts
@@ -0,0 +1,104 @@
+// Copyright (c) 2024. Sendanor <info@sendanor.fi>. All rights reserved.
+
+import { EntityFactoryImpl } from "../../entities/types/EntityFactoryImpl";
+import { VariableType } from "../../entities/types/VariableType";
+import { Banner } from "./Banner";
+import { BannerDTO } from "./BannerDTO";
+import { BannerLanguage } from "./BannerLanguage";
+import { BannerLocation } from "./BannerLocation";
+import { BannerState } from "./BannerState";
+import { BannerType } from "./BannerType";
+
+export const BannerEntityFactory = (
+    EntityFactoryImpl.create<BannerDTO, Banner>('Banner')
+                     .add( EntityFactoryImpl.createProperty("state").setTypes(BannerState) )
+                     .add( EntityFactoryImpl.createProperty("type").setTypes(BannerType) )
+                     .add( EntityFactoryImpl.createProperty("addTitleText").setTypes(VariableType.BOOLEAN) )
+                     .add( EntityFactoryImpl.createProperty("addAltText").setTypes(VariableType.BOOLEAN) )
+                     .add( EntityFactoryImpl.createProperty("title").setTypes(VariableType.STRING) )
+                     .add( EntityFactoryImpl.createProperty("url").setTypes(VariableType.STRING) )
+                     .add( EntityFactoryImpl.createProperty("imageUrl").setTypes(VariableType.STRING) )
+                     .add( EntityFactoryImpl.createProperty("imageAlt").setTypes(VariableType.STRING) )
+                     .add( EntityFactoryImpl.createOptionalArrayProperty("languages").setTypes(BannerLanguage) )
+                     .add( EntityFactoryImpl.createOptionalArrayProperty("locations").setTypes(BannerLocation) )
+                     .add( EntityFactoryImpl.createProperty("draftTime").setTypes(VariableType.STRING, VariableType.UNDEFINED) )
+                     .add( EntityFactoryImpl.createProperty("startTime").setTypes(VariableType.STRING, VariableType.UNDEFINED) )
+                     .add( EntityFactoryImpl.createProperty("publishTime").setTypes(VariableType.STRING, VariableType.UNDEFINED) )
+                     .add( EntityFactoryImpl.createProperty("endTime").setTypes(VariableType.STRING, VariableType.UNDEFINED) )
+                     .add( EntityFactoryImpl.createProperty("started").setTypes(VariableType.BOOLEAN, VariableType.UNDEFINED) )
+                     .add( EntityFactoryImpl.createProperty("published").setTypes(VariableType.BOOLEAN, VariableType.UNDEFINED) )
+                     .add( EntityFactoryImpl.createProperty("ended").setTypes(VariableType.BOOLEAN, VariableType.UNDEFINED) )
+                     .add( EntityFactoryImpl.createProperty("owner").setTypes(VariableType.STRING, VariableType.UNDEFINED) )
+);
+
+export const isBannerDTO = BannerEntityFactory.createTestFunctionOfDTO();
+
+export const isBanner = BannerEntityFactory.createTestFunctionOfInterface();
+
+export const explainBannerDTO = BannerEntityFactory.createExplainFunctionOfDTO();
+
+export const isBannerDTOOrUndefined = BannerEntityFactory.createTestFunctionOfDTOorOneOf(VariableType.UNDEFINED);
+
+export const explainBannerDTOOrUndefined = BannerEntityFactory.createExplainFunctionOfDTOorOneOf(VariableType.UNDEFINED);
+
+export const BaseBannerEntity = BannerEntityFactory.createEntityType();
+
+/**
+ * Banner entity.
+ */
+export class BannerEntity
+    extends BaseBannerEntity
+    implements Banner
+{
+
+    /**
+     * Creates a Banner entity.
+     *
+     * @param value The optional DTO of Banner
+     */
+    public static create (
+        value ?: BannerDTO,
+    ) : BannerEntity {
+        return new BannerEntity(value);
+    }
+
+    /**
+     * Creates a Banner entity from DTO.
+     *
+     * @param dto The optional DTO of Banner
+     */
+    public static createFromDTO (
+        dto : BannerDTO,
+    ) : BannerEntity {
+        return new BannerEntity(dto);
+    }
+
+    /**
+     * Normalizes the value as a DTO.
+     */
+    public static toDTO (
+        value: BannerDTO | Banner | BannerEntity,
+    ) : BannerDTO {
+        if (isBannerEntity(value)) {
+            return value.getDTO();
+        } else if (isBanner(value)) {
+            return value.getDTO();
+        } else {
+            return value;
+        }
+    }
+
+    /**
+     * Construct an entity of BannerEntity.
+     */
+    public constructor (
+        dto ?: BannerDTO | undefined,
+    ) {
+        super(dto);
+    }
+
+}
+
+export function isBannerEntity (value: unknown): value is BannerEntity {
+    return value instanceof BannerEntity;
+}