Barcelona is wellknown for its buildings and its architecture. Gaudi is one of the most famous Catalanian architects . His impressive and unique buildngs surrond the whole city. During my trip in Barcelona I had the chance to visit most of them including Park Guell, Casa Batllo, Casa Mila and Sagrada Famillia. Gaudi in his works used technical rationality, prodigious mastery of forms and materials and all of the had symbolic content. He always provide practical solutions such as planning for viaduct and paths for people. Gaudi was mainly inspired by his passion in life about architecture, nature and religion. In all of his building he was influenced by neo-gothic art and oriental tecnhiques. Generally, I like Gaudi’s building around Barcelona but I was really impressed by the prints and the colors on the mosaics that decorated the buildings of Parc Guell.