large group of people, mostly men, gathered outdoors, sitting on the ground

large group of people, mostly men, gathered outdoors, sitting on the ground. Many are holding and waving Iranian flags. They appear to be chanting or singing together. The crowd is facing a large, multi-story building with arched openings, possibly a mosque or religious structure. The day appears to be sunny and clear. A few light poles are visible. One man stands out in the crowd, wearing a black suit. A crane is visible in the far background. There is a lot of activity within the crowd, with people clapping, raising their hands, and generally appearing engaged in the event.