The architecture in Seville dates back several centuries.  At its founding the city belonged to Romans, but it was later taken over by the Moors during their invasion of Spain.  Today most of the cities oldest buildings reflect the influence of the Moors and their long reign.  Many of Seville's churches were once Muslim Mosques and appear Arabic in style.  Some of Seville's later buildings, though still old by American standards, date back to the 11th Century and reflect a more Spanish influence. 

Today Seville is a modern city, with its new building reflecting this image. Many of its newer buildings were built in the early 90's before the city hosted the 1992 World's Fair.