A mosque is a place of worship for followers of Islam. The mosque serves as a place where Muslims can come together for salat (prayer. Grand entryways and tall towers, or minarets, have long been and continue to be closely associated with mosques. However, the first three mosques were very simple open spaces on the Arabian Peninsula. Mosques evolved significantly over the next 1,000 years, acquiring their now-distinctive features and adapting to cultures around the world.