Thank you very much for this comment. You have my intentions exactly right. I put the focal point near the middle of the colonnade with the depth of field extending to just short of the end, and then waited. The subject appeared serendipitously. MP.
Protest at Guardia Nacional headquarters in Barcelona one day after Spanish forces intervened to prevent a referendum on independence from taking place in Catalonia. 900 people were injured. The vote went forward and the independence vote won.