Hundreds of thousands on Heldenplatz in Vienna on March 15, 1938
<bdi><a href="https://en.wikipedia.org/wiki/en:Heinrich_Hoffmann_(photographer)" class="extiw" title="w:en:Heinrich Hoffmann (photographer)"><span title="German photographer, personal photographer of Adolf Hitler (1885-1957)">Heinrich Hoffmann</span></a>
</bdi>
1938-03-15
USA National Archive in Washington, D.C.