Built in the 18th century, the Prado Museum is considered to be one of the greatest museums in the world. It is also the most comprehensive and authoritative gallery for collecting Spanish paintings. There are art treasures of Spain, Flanders and Italy from the 15th to 19th centuries. Especially the works of the Spanish painter Goya are the most abundant. The second floor is the most important part of the museum. It is divided into many small halls and displays many Spanish and Italian paintings.