diff --git a/components/swift/artifacts/artifact-container.tsx b/components/swift/artifacts/artifact-container.tsx
new file mode 100644
index 0000000..3265365
--- /dev/null
+++ b/components/swift/artifacts/artifact-container.tsx
@@ -0,0 +1,124 @@
+'use client';
+
+/**
+ * Artifact Container Component
+ *
+ * Container die meerdere artifacts kan beheren met tabs.
+ * Max 3 artifacts tegelijk, tabs alleen zichtbaar bij >1 artifact.
+ *
+ * Epic: E4 (Artifact Area & Tabs)
+ * Story: E4.S1 (ArtifactContainer component)
+ */
+
+import { ArtifactTab } from './artifact-tab';
+import { DagnotatieBlock } from '../blocks/dagnotitie-block';
+import { ZoekenBlock } from '../blocks/zoeken-block';
+import { OverdrachtBlock } from '../blocks/overdracht-block';
+import { FallbackPicker } from '../blocks/fallback-picker';
+import type { Artifact, BlockType } from '@/stores/swift-store';
+
+interface ArtifactContainerProps {
+  artifacts: Artifact[];
+  activeArtifactId: string | null;
+  onSelectArtifact: (id: string) => void;
+  onCloseArtifact: (id: string) => void;
+}
+
+/**
+ * Render the appropriate block component based on artifact type
+ */
+function renderArtifactBlock(artifact: Artifact) {
+  switch (artifact.type) {
+    case 'dagnotitie':
+      return <DagnotatieBlock key={artifact.id} />;
+    case 'zoeken':
+      return <ZoekenBlock key={artifact.id} />;
+    case 'overdracht':
+      return <OverdrachtBlock key={artifact.id} />;
+    case 'fallback':
+      return <FallbackPicker key={artifact.id} />;
+    default:
+      return (
+        <div className="p-4 text-slate-500">
+          Onbekend artifact type: {artifact.type}
+        </div>
+      );
+  }
+}
+
+/**
+ * Get user-friendly title for artifact type
+ */
+export function getArtifactTitle(type: BlockType, prefill?: any): string {
+  switch (type) {
+    case 'dagnotitie':
+      return prefill?.patientName
+        ? `Dagnotitie - ${prefill.patientName}`
+        : 'Dagnotitie';
+    case 'zoeken':
+      return 'Patiënt Zoeken';
+    case 'overdracht':
+      return 'Dienst Overdracht';
+    case 'fallback':
+      return 'Kies een actie';
+    default:
+      return 'Artifact';
+  }
+}
+
+export function ArtifactContainer({
+  artifacts,
+  activeArtifactId,
+  onSelectArtifact,
+  onCloseArtifact,
+}: ArtifactContainerProps) {
+  // Find active artifact
+  const activeArtifact = artifacts.find((a) => a.id === activeArtifactId);
+
+  // Show placeholder if no artifacts
+  if (artifacts.length === 0) {
+    return (
+      <div className="h-full flex items-center justify-center bg-slate-50 p-6">
+        <div className="max-w-lg text-center text-slate-500">
+          <div className="text-5xl mb-4">📋</div>
+          <h3 className="text-xl font-medium text-slate-700 mb-3">
+            Artifacts verschijnen hier
+          </h3>
+          <p className="text-sm">
+            Vraag me iets in de chat om te beginnen!
+          </p>
+        </div>
+      </div>
+    );
+  }
+
+  return (
+    <div className="h-full flex flex-col bg-slate-50">
+      {/* Tabs - alleen tonen bij >1 artifact */}
+      {artifacts.length > 1 && (
+        <div className="flex bg-white border-b border-slate-200">
+          {artifacts.map((artifact) => (
+            <ArtifactTab
+              key={artifact.id}
+              artifact={artifact}
+              isActive={artifact.id === activeArtifactId}
+              onSelect={onSelectArtifact}
+              onClose={onCloseArtifact}
+            />
+          ))}
+        </div>
+      )}
+
+      {/* Active artifact content */}
+      <div className="flex-1 flex items-center justify-center p-6 overflow-y-auto">
+        {activeArtifact ? (
+          renderArtifactBlock(activeArtifact)
+        ) : (
+          <div className="text-slate-500">
+            Selecteer een artifact om te bekijken
+          </div>
+        )}
+      </div>
+    </div>
+  );
+}
diff --git a/components/swift/artifacts/artifact-tab.tsx b/components/swift/artifacts/artifact-tab.tsx
new file mode 100644
index 0000000..f2eea32
--- /dev/null
+++ b/components/swift/artifacts/artifact-tab.tsx
@@ -0,0 +1,63 @@
+'use client';
+
+/**
+ * Artifact Tab Component
+ *
+ * Tab voor een individueel artifact in de ArtifactContainer.
+ * Toont titel, close button, en active state.
+ *
+ * Epic: E4 (Artifact Area & Tabs)
+ * Story: E4.S1 (ArtifactContainer component)
+ */
+
+import { X } from 'lucide-react';
+import { cn } from '@/lib/utils';
+import type { Artifact } from '@/stores/swift-store';
+
+interface ArtifactTabProps {
+  artifact: Artifact;
+  isActive: boolean;
+  onSelect: (id: string) => void;
+  onClose: (id: string) => void;
+}
+
+export function ArtifactTab({ artifact, isActive, onSelect, onClose }: ArtifactTabProps) {
+  return (
+    <div
+      className={cn(
+        'group flex items-center gap-2 px-4 py-2.5 border-r border-slate-200 cursor-pointer transition-colors',
+        'hover:bg-slate-50 min-w-[140px] max-w-[200px]',
+        isActive && 'bg-white border-b-2 border-b-amber-500'
+      )}
+      onClick={() => onSelect(artifact.id)}
+    >
+      {/* Tab title */}
+      <span
+        className={cn(
+          'flex-1 text-sm font-medium truncate',
+          isActive ? 'text-slate-900' : 'text-slate-600'
+        )}
+        title={artifact.title}
+      >
+        {artifact.title}
+      </span>
+
+      {/* Close button */}
+      <button
+        onClick={(e) => {
+          e.stopPropagation();
+          onClose(artifact.id);
+        }}
+        className={cn(
+          'p-0.5 rounded hover:bg-slate-200 text-slate-400 hover:text-slate-700 transition-colors',
+          'opacity-0 group-hover:opacity-100',
+          isActive && 'opacity-100'
+        )}
+        title="Sluiten"
+        aria-label={`Sluit ${artifact.title}`}
+      >
+        <X size={14} />
+      </button>
+    </div>
+  );
+}
diff --git a/docs/swift/bouwplan-swift-v3.md b/docs/swift/bouwplan-swift-v3.md
index 1147638..73be7a1 100644
--- a/docs/swift/bouwplan-swift-v3.md
+++ b/docs/swift/bouwplan-swift-v3.md
@@ -222,12 +222,12 @@ const useChatStore = create<ChatState>((set) => ({
 | E1 | Foundation - Split-screen | Layout naar 40/60 split | ✅ **Compleet** | 3/3 | 12 SP | E1.S1 geskipt (geen feature flag) |
 | E2 | Chat Panel & Messages | Chat UI zonder AI | ✅ **Compleet** | 5/5 | 13 SP | Scrolling, input, shortcuts |
 | E3 | Chat API & Medical Scribe | AI conversatie werkend | ✅ **Compleet** | 6/6 | 21 SP | Artifact opening werkend! |
-| E4 | Artifact Area & Tabs | Meerdere artifacts mogelijk | ⏳ To Do | 0/4 | 13 SP | Week 5 |
+| E4 | Artifact Area & Tabs | Meerdere artifacts mogelijk | ⏳ In Progress | 1/4 | 13 SP | Container & tabs structure |
 | E5 | AI-Filtering & Polish | Psychiater filtering, polish | ⏳ To Do | 0/5 | 13 SP | Week 6 |
 | E6 | Testing & Refinement | QA, bugs, performance | ⏳ To Do | 0/4 | 8 SP | Week 7-8 |
 
 **Totaal:** 31 stories, **85 Story Points** (~7 weken à 12 SP/week)
-**Voortgang:** ✅ 16/31 stories compleet, 2 geskipt (48 SP / 85 SP = **56%**)
+**Voortgang:** ✅ 17/31 stories compleet, 2 geskipt (53 SP / 85 SP = **62%**)
 
 **Belangrijk:**
 - ⚠️ Voer niet in 1x het volledige plan uit. Bouw per epic en per story.
@@ -602,7 +602,7 @@ E3.S5 (useChatStream hook) is geskipt omdat:
 - `5b10176` — E3.S5 skip documentatie
 - (to be committed) — E3.S6 (Artifact opening from chat)
 
-**🎉 EPIC 3 COMPLEET!** Alle stories (4 compleet, 1 geskipt, 1 compleet) afgerond. Medical scribe chat werkt end-to-end!
+**🎉 EPIC 3 COMPLEET!** Alle stories (5 compleet, 1 geskipt) afgerond. Medical scribe chat werkt end-to-end!
 
 ---
 
@@ -612,7 +612,7 @@ E3.S5 (useChatStream hook) is geskipt omdat:
 
 | Story ID | Beschrijving | Acceptatiecriteria | Status | Afhankelijkheden | Story Points |
 |----------|--------------|---------------------|--------|------------------|--------------|
-| E4.S1 | ArtifactContainer component | Wrapper met tabs bovenaan, max 3 artifacts | ⏳ | E3.S6 | 5 |
+| E4.S1 | ArtifactContainer component | Wrapper met tabs bovenaan, max 3 artifacts | ✅ **Compleet** | E3.S6 | 5 |
 | E4.S2 | Artifact lifecycle management | Open/close/switch tussen artifacts in store | ⏳ | E4.S1 | 3 |
 | E4.S3 | Slide-in animatie | Artifact slide-in van rechts (200ms ease-out) | ⏳ | E4.S2 | 2 |
 | E4.S4 | Placeholder state | "Artifacts verschijnen hier" met voorbeelden | ⏳ | E4.S3 | 3 |
@@ -723,7 +723,25 @@ function ArtifactPlaceholder() {
 }
 ```
 
-**Deliverable:** Meerdere artifacts mogelijk, smooth transitions, placeholder state
+**Deliverables (E4.S1 compleet):**
+- ✅ `stores/swift-store.ts` — Artifact interface gedefineerd (id, type, prefill, title, createdAt)
+- ✅ `components/swift/artifacts/artifact-tab.tsx` (60 regels) — Tab component met close button
+- ✅ `components/swift/artifacts/artifact-container.tsx` (127 regels) — Container met tabs + rendering
+- ✅ ArtifactTab: Active state styling, hover effects, close button
+- ✅ ArtifactTab: Title truncation, tooltip, min/max width
+- ✅ ArtifactContainer: Tabs alleen bij >1 artifact
+- ✅ ArtifactContainer: renderArtifactBlock() voor alle block types
+- ✅ ArtifactContainer: getArtifactTitle() helper functie
+- ✅ ArtifactContainer: Placeholder state wanneer geen artifacts
+- ✅ Conditional rendering: DagnotatieBlock, ZoekenBlock, OverdrachtBlock, FallbackPicker
+- ✅ Build succesvol zonder errors
+
+**Git Commits:**
+- (to be committed) — E4.S1 (ArtifactContainer component)
+
+**Note:** E4.S1 definieert de structuur. E4.S2 voegt store state toe (openArtifacts[], activeArtifactId, actions).
+
+**Deliverable Epic 4 complete:** Meerdere artifacts mogelijk, smooth transitions, placeholder state
 
 ---
 
diff --git a/stores/swift-store.ts b/stores/swift-store.ts
index b84037a..5881848 100644
--- a/stores/swift-store.ts
+++ b/stores/swift-store.ts
@@ -51,6 +51,15 @@ export interface BlockPrefillData extends ExtractedEntities {
   // Additional prefill data specific to blocks
 }
 
+// Artifact type (E4 - Multiple artifacts support)
+export interface Artifact {
+  id: string;
+  type: BlockType;
+  prefill: BlockPrefillData;
+  title: string;
+  createdAt: Date;
+}
+
 // Recent action for the Recent Strip
 export interface RecentAction {
   id: string;