Introduction to San Diego City Hall: The San Diego City Hall building was originally the city hall and prison during the founding of San Diego. It was rebuilt in a neoclassical style in the second half of the 18th century and was destroyed by fire in 1891. It was rebuilt on the original site from 1892 to 1895. Since then, it has become the seat of the San Diego Municipal Government for the first time. The main agencies of the Santiago City Government are located in this building. Exhibitions and other activities are often held in the central hall and are open to the public.