diff --git a/src/app/app.routes.ts b/src/app/app.routes.ts
index eda6bfb..8a4b465 100644
--- a/src/app/app.routes.ts
+++ b/src/app/app.routes.ts
@@ -218,6 +218,15 @@ const coreRoutes: Routes = [
           breadcrumb: [{ labelKey: 'adminShell.nav.finance' }]
         }
       },
+      {
+        path: 'marketplaces',
+        loadComponent: () => import('./features/admin/marketplaces/pages/admin-marketplaces-page.component').then(m => m.AdminMarketplacesPageComponent),
+        data: {
+          titleKey: 'adminShell.nav.marketplaces',
+          descriptionKey: 'adminShell.nav.marketplaces',
+          breadcrumb: [{ labelKey: 'adminShell.nav.marketplaces' }]
+        }
+      },
       {
         path: 'moderation',
         loadComponent: () => import('./features/admin/moderation/pages/admin-reviews-list-page.component').then(m => m.AdminReviewsListPageComponent),
diff --git a/src/app/core/marketplace-registry/models/marketplace.model.ts b/src/app/core/marketplace-registry/models/marketplace.model.ts
new file mode 100644
index 0000000..585d70e
--- /dev/null
+++ b/src/app/core/marketplace-registry/models/marketplace.model.ts
@@ -0,0 +1,28 @@
+/** Per docs/backend/PHASE-9-TENANT-REGISTRY-DOMAINS-CONTRACT.md §1-2. */
+export type MarketplaceLifecycleState =
+  | 'draft' | 'configured' | 'content_ready' | 'domains_planned'
+  | 'staging_live' | 'qa_passed' | 'production_ready' | 'live' | 'paused' | 'archived';
+
+export interface Marketplace {
+  id: string;
+  name: string;
+  code: string;
+  type: 'commerce' | 'mall_directory' | 'hybrid' | 'single_brand';
+  ownerId: string;
+  countries: string[];
+  currencies: string[];
+  lifecycleState: MarketplaceLifecycleState;
+}
+
+export interface MarketplaceDomain {
+  marketplaceId: string;
+  domain: string;
+  type: 'production' | 'www' | 'staging' | 'preview' | 'api' | 'seller';
+  status: 'planned' | 'dns_pending' | 'ssl_pending' | 'active' | 'failed';
+}
+
+export interface LifecycleAdvanceResult {
+  currentState: MarketplaceLifecycleState;
+  nextState: MarketplaceLifecycleState | null;
+  blockers: string[];
+}
diff --git a/src/app/core/marketplace-registry/services/marketplace-gateway.interface.ts b/src/app/core/marketplace-registry/services/marketplace-gateway.interface.ts
new file mode 100644
index 0000000..97e1730
--- /dev/null
+++ b/src/app/core/marketplace-registry/services/marketplace-gateway.interface.ts
@@ -0,0 +1,9 @@
+import { Observable } from 'rxjs';
+import { LifecycleAdvanceResult, Marketplace, MarketplaceDomain } from '../models/marketplace.model';
+
+/** Per docs/backend/PHASE-9-TENANT-REGISTRY-DOMAINS-CONTRACT.md §2-4. */
+export interface MarketplaceGateway {
+  loadMarketplaces(): Observable<Marketplace[]>;
+  loadDomains(marketplaceId: string): Observable<MarketplaceDomain[]>;
+  loadLifecycle(marketplaceId: string): Observable<LifecycleAdvanceResult>;
+}
diff --git a/src/app/core/marketplace-registry/services/marketplace-gateway.token.ts b/src/app/core/marketplace-registry/services/marketplace-gateway.token.ts
new file mode 100644
index 0000000..216c999
--- /dev/null
+++ b/src/app/core/marketplace-registry/services/marketplace-gateway.token.ts
@@ -0,0 +1,9 @@
+import { InjectionToken, inject } from '@angular/core';
+import { MarketplaceGateway } from './marketplace-gateway.interface';
+import { MarketplaceLocalGateway } from './marketplace-local.gateway';
+
+/** Swap point for docs/backend/PHASE-9-TENANT-REGISTRY-DOMAINS-CONTRACT.md. */
+export const MARKETPLACE_GATEWAY = new InjectionToken<MarketplaceGateway>('MARKETPLACE_GATEWAY', {
+  providedIn: 'root',
+  factory: () => inject(MarketplaceLocalGateway),
+});
diff --git a/src/app/core/marketplace-registry/services/marketplace-local.gateway.ts b/src/app/core/marketplace-registry/services/marketplace-local.gateway.ts
new file mode 100644
index 0000000..7e1fab2
--- /dev/null
+++ b/src/app/core/marketplace-registry/services/marketplace-local.gateway.ts
@@ -0,0 +1,42 @@
+import { Injectable, inject } from '@angular/core';
+import { Observable, map, of } from 'rxjs';
+import { LifecycleAdvanceResult, Marketplace, MarketplaceDomain } from '../models/marketplace.model';
+import { MarketplaceGateway } from './marketplace-gateway.interface';
+import { ConfigService } from '../../config/config.service';
+
+/**
+ * The platform runs one live tenant per deployment today - there is no
+ * registry of multiple marketplaces anywhere in the codebase. This derives
+ * a single-row "registry" from the current tenant's own bootstrap so the
+ * shape is real, ready to become a genuine multi-row registry once
+ * docs/backend/PHASE-9-TENANT-REGISTRY-DOMAINS-CONTRACT.md ships.
+ */
+@Injectable({ providedIn: 'root' })
+export class MarketplaceLocalGateway implements MarketplaceGateway {
+  private readonly configService = inject(ConfigService);
+
+  loadMarketplaces(): Observable<Marketplace[]> {
+    const bootstrap = this.configService.getBootstrapSnapshot();
+    return of([{
+      id: 'current',
+      name: bootstrap?.branding?.brandName || 'This marketplace',
+      code: 'current',
+      type: 'commerce',
+      ownerId: 'unknown',
+      countries: [],
+      currencies: [],
+      lifecycleState: 'live',
+    }]);
+  }
+
+  loadDomains(marketplaceId: string): Observable<MarketplaceDomain[]> {
+    if (typeof window === 'undefined') {
+      return of([]);
+    }
+    return of([{ marketplaceId, domain: window.location.hostname, type: 'production', status: 'active' }]);
+  }
+
+  loadLifecycle(_marketplaceId: string): Observable<LifecycleAdvanceResult> {
+    return of({ currentState: 'live', nextState: null, blockers: [] });
+  }
+}
diff --git a/src/app/features/admin/marketplaces/facade/admin-marketplaces.facade.ts b/src/app/features/admin/marketplaces/facade/admin-marketplaces.facade.ts
new file mode 100644
index 0000000..76cd30e
--- /dev/null
+++ b/src/app/features/admin/marketplaces/facade/admin-marketplaces.facade.ts
@@ -0,0 +1,27 @@
+import { Injectable, inject, signal } from '@angular/core';
+import { take } from 'rxjs/operators';
+import { LifecycleAdvanceResult, Marketplace, MarketplaceDomain } from '../../../../core/marketplace-registry/models/marketplace.model';
+import { MARKETPLACE_GATEWAY } from '../../../../core/marketplace-registry/services/marketplace-gateway.token';
+
+@Injectable({ providedIn: 'root' })
+export class AdminMarketplacesFacade {
+  private readonly gateway = inject(MARKETPLACE_GATEWAY);
+
+  readonly marketplaces = signal<Marketplace[]>([]);
+  readonly domains = signal<MarketplaceDomain[]>([]);
+  readonly lifecycle = signal<LifecycleAdvanceResult | null>(null);
+  readonly loading = signal(false);
+
+  load(): void {
+    this.loading.set(true);
+    this.gateway.loadMarketplaces().pipe(take(1)).subscribe(items => {
+      this.marketplaces.set(items);
+      this.loading.set(false);
+      const first = items[0];
+      if (first) {
+        this.gateway.loadDomains(first.id).pipe(take(1)).subscribe(d => this.domains.set(d));
+        this.gateway.loadLifecycle(first.id).pipe(take(1)).subscribe(l => this.lifecycle.set(l));
+      }
+    });
+  }
+}
diff --git a/src/app/features/admin/marketplaces/pages/admin-marketplaces-page.component.html b/src/app/features/admin/marketplaces/pages/admin-marketplaces-page.component.html
new file mode 100644
index 0000000..61f8809
--- /dev/null
+++ b/src/app/features/admin/marketplaces/pages/admin-marketplaces-page.component.html
@@ -0,0 +1,25 @@
+<div class="marketplaces-page">
+  <header>
+    <h1>Marketplaces</h1>
+    <p>Registry, domains, and release/lifecycle status. Single-tenant derived until docs/backend/PHASE-9-TENANT-REGISTRY-DOMAINS-CONTRACT.md ships a real registry.</p>
+  </header>
+
+  @for (m of facade.marketplaces(); track m.id) {
+    <section class="marketplaces-page__card">
+      <h2>{{ m.name }} <app-badge variant="info">{{ m.lifecycleState }}</app-badge></h2>
+      <p>Type: {{ m.type }} - Code: {{ m.code }}</p>
+    </section>
+  }
+
+  <section>
+    <h2>Domains &amp; Releases</h2>
+    <ul>
+      @for (d of facade.domains(); track d.domain) {
+        <li>{{ d.domain }} - <app-badge [variant]="d.status === 'active' ? 'success' : 'neutral'">{{ d.status }}</app-badge> ({{ d.type }})</li>
+      }
+    </ul>
+    @if (facade.lifecycle(); as lifecycle) {
+      <p>Lifecycle: {{ lifecycle.currentState }} - blockers: {{ lifecycle.blockers.length === 0 ? 'none' : lifecycle.blockers.join(', ') }}</p>
+    }
+  </section>
+</div>
diff --git a/src/app/features/admin/marketplaces/pages/admin-marketplaces-page.component.scss b/src/app/features/admin/marketplaces/pages/admin-marketplaces-page.component.scss
new file mode 100644
index 0000000..2bf3571
--- /dev/null
+++ b/src/app/features/admin/marketplaces/pages/admin-marketplaces-page.component.scss
@@ -0,0 +1,20 @@
+.marketplaces-page {
+  display: flex;
+  flex-direction: column;
+  gap: 24px;
+
+  &__card {
+    padding: 16px;
+    border: 1px solid var(--border-color);
+    border-radius: var(--radius-md);
+  }
+
+  ul {
+    list-style: none;
+    margin: 0;
+    padding: 0;
+    display: flex;
+    flex-direction: column;
+    gap: 6px;
+  }
+}
diff --git a/src/app/features/admin/marketplaces/pages/admin-marketplaces-page.component.ts b/src/app/features/admin/marketplaces/pages/admin-marketplaces-page.component.ts
new file mode 100644
index 0000000..9772c84
--- /dev/null
+++ b/src/app/features/admin/marketplaces/pages/admin-marketplaces-page.component.ts
@@ -0,0 +1,20 @@
+import { ChangeDetectionStrategy, Component, inject } from '@angular/core';
+import { CommonModule } from '@angular/common';
+import { AdminMarketplacesFacade } from '../facade/admin-marketplaces.facade';
+import { BadgeComponent } from '../../../../shared/ui/badge/badge.component';
+
+@Component({
+  selector: 'app-admin-marketplaces-page',
+  standalone: true,
+  imports: [CommonModule, BadgeComponent],
+  templateUrl: './admin-marketplaces-page.component.html',
+  styleUrls: ['./admin-marketplaces-page.component.scss'],
+  changeDetection: ChangeDetectionStrategy.OnPush
+})
+export class AdminMarketplacesPageComponent {
+  readonly facade = inject(AdminMarketplacesFacade);
+
+  constructor() {
+    this.facade.load();
+  }
+}
diff --git a/src/app/features/admin/shell/admin-nav.model.ts b/src/app/features/admin/shell/admin-nav.model.ts
index d0aa9a5..d0ca1fa 100644
--- a/src/app/features/admin/shell/admin-nav.model.ts
+++ b/src/app/features/admin/shell/admin-nav.model.ts
@@ -31,6 +31,7 @@ export type AdminNavEntry = AdminNavLink | AdminNavGroup | AdminNavAction;
 
 export const ADMIN_NAV_PRIMARY: AdminNavEntry[] = [
   { type: 'link', id: 'dashboard', icon: 'home', labelKey: 'adminShell.nav.dashboard', path: ['dashboard'] },
+  { type: 'link', id: 'marketplaces', icon: 'network', labelKey: 'adminShell.nav.marketplaces', path: ['marketplaces'] },
   { type: 'group', labelKey: 'adminShell.nav.catalogGroup' },
   { type: 'link', id: 'products', icon: 'package', labelKey: 'adminShell.nav.products', path: ['products'] },
   { type: 'link', id: 'categories', icon: 'tags', labelKey: 'adminShell.nav.categories', path: ['categories'] },
diff --git a/src/app/i18n/en.ts b/src/app/i18n/en.ts
index b08f38e..018d1e0 100644
--- a/src/app/i18n/en.ts
+++ b/src/app/i18n/en.ts
@@ -2062,6 +2062,7 @@ export const en: Translations = {
       notifications: 'Notifications',
       integrations: 'Integrations',
       finance: 'Payments & Finance',
+      marketplaces: 'Marketplaces',
       reviews: 'Reviews',
       reports: 'Reports',
       partnersGroup: 'Partners',
diff --git a/src/app/i18n/hy.ts b/src/app/i18n/hy.ts
index 39e987a..8979b48 100644
--- a/src/app/i18n/hy.ts
+++ b/src/app/i18n/hy.ts
@@ -2056,6 +2056,7 @@ export const hy: Translations = {
       notifications: 'Ծանուցումներ',
       integrations: 'Ինտեգրումներ',
       finance: 'Վճարումներ և ֆինանսներ',
+      marketplaces: 'Մարկետփլեյսներ',
       transactions: 'Գործարքներ',
       reviews: 'Կարծիքներ',
       reports: 'Հաշվետվություններ',
diff --git a/src/app/i18n/ru.ts b/src/app/i18n/ru.ts
index b0e3afe..9f4126e 100644
--- a/src/app/i18n/ru.ts
+++ b/src/app/i18n/ru.ts
@@ -2056,6 +2056,7 @@ export const ru: Translations = {
       notifications: 'Уведомления',
       integrations: 'Интеграции',
       finance: 'Платежи и финансы',
+      marketplaces: 'Маркетплейсы',
       transactions: 'Транзакции',
       reviews: 'Отзывы',
       reports: 'Отчёты',
diff --git a/src/app/i18n/translations.ts b/src/app/i18n/translations.ts
index fb684fa..15fcbae 100644
--- a/src/app/i18n/translations.ts
+++ b/src/app/i18n/translations.ts
@@ -2071,6 +2071,7 @@ export interface Translations {
       notifications: string;
       integrations: string;
       finance: string;
+      marketplaces: string;
       reports: string;
       partnersGroup: string;
       sellerManagement: string;