diff --git a/Makefile b/Makefile
index f816a0e97..9ff6bfeb1 100644
--- a/Makefile
+++ b/Makefile
@@ -197,7 +197,7 @@ $(NEWSFILES): news.xml $(NAVIGATION) $(STYLE)
 $(CALENDAR_SUMMARY) : STYLE=xsl/calendar-summary.xsl
 $(CALENDAR_SUMMARY) : NOVALID:=true
 $(CALENDAR_SUMMARY) : VFLAGS_IN=$(VFLAGS)
-$(CALENDAR_SUMMARY): content/events.xml news.xml
+$(CALENDAR_SUMMARY): content/events.xml news.xml autotopia-events.xml
 	$(call xml_process)
 
 # XCal
diff --git a/xsl/calendar-summary.xsl b/xsl/calendar-summary.xsl
index 4b8561180..be0c0a8e8 100644
--- a/xsl/calendar-summary.xsl
+++ b/xsl/calendar-summary.xsl
@@ -25,6 +25,15 @@
             </xsl:apply-templates>
           </xsl:if>
         </xsl:for-each>
+
+        <!-- Events aus Autotopia ziehen -->
+        <xsl:for-each select="document('../autotopia-events.xml')/page/news/newsfile">
+          <xsl:variable name="news" select="document(concat('../', .))"/>
+          <xsl:apply-templates select="$news/item/event">
+            <xsl:with-param name="link"
+                            select="concat('https://autotopia.c3d2.de/event/', substring-before(substring-after(., 'content/autotopia/'), '.xml'), '.html')"/>
+          </xsl:apply-templates>
+        </xsl:for-each>
       </calendar-summary>
     </page>
   </xsl:template>