The number of participants was roughly double that of the previous year. The United States ambassador, Marie L. Yovanovitch, and Rebecca Harms of the European Parliament were at the front of the march.

Along the way supporters of lesbian, gay, bisexual and transgender rights were guarded by some 5,000 officers, including mounted police officers.

“There must always be the police, otherwise someone will come, otherwise someone will interrupt, otherwise someone will attack,” said one marcher, Liza, 19. She said, “I think this is not the way it should be in a civilized country.”