This was an early stage of the process, when people were gathering at Heroes' Square (which was chosen as the starting location). The photo is facing the main portion of the crowd towards Andrássy Avenue. You can see a person holding a DK flag on the left, and a O1G board
<a href="//commons.wikimedia.org/w/index.php?title=User:Vauia_Rex&amp;action=edit&amp;redlink=1" class="new" title="User:Vauia Rex (page does not exist)">Vauia Rex</a>
CC BY-SA 4.0
<span class="int-own-work" lang="en">Own work</span>