Casa Batlló is a renowned building located in the heart of Barcelona and is one of Antoni Gaudí’s masterpieces. Casa Batlló is a remodel of a previously built house. It was redesigned in 1904 by Gaudí and has been refurbished several times after that. Casa Batlló evokes the creativity and playfulness of Gaudí’s work through the incrassate facades and creative floors. Gaudí's assistants Domènec Sugrañes i Gras, Josep Canaleta and Joan Rubió also contributed to the renovation project.The local name for the building is Casa dels ossos , as it has a visceral, skeletal organic quality. It was originally designed for a middle-class family and situated in a prosperous district of Barcelona.The building looks very remarkable — like everything Gaudí designed, only identifiable as Modernisme or Art Nouveau in the broadest sense. The ground floor, in particular, is rather astonishing with tracery, irregular oval windows and flowing sculpted stone work.It seems that the goal of the designer was to avoid straight lines completely. Much of the façade is decorated with a mosaic made of broken ceramic tiles that starts in shades of golden orange moving into greenish blues. The roof is arched and was likened to the back of a dragon or dinosaur. A common theory about the building is that the rounded feature to the left of centre, terminating at the top in a turret and cross, represents the lance of Saint George, which has been plunged into the back of the dragon.The building that is now Casa Batlló was built in 1877 by Emili Sala Cortés, one of Gaudí’s teachers, commissioned by Lluís Sala Sánchez.It was a classical building without remarkable characteristics within the eclecticism traditional by the end of the 19th century.The building had a basement, a ground floor, four other floors and a garden in the back. The house was bought by Josep Batlló in 1900. The design of the house made the home undesirable to buyers but the Batlló family decided to buy the place due to its centralized location. It is located in the middle of Passeig de Gracia, which in the early 20th century was known as a very prestigious and fashionable area. It was an area where the prestigious family could draw attention to themselves.In 1904 Josep Batlló hired Gaudí to design his home; at first his plans were to tear down the building and construct a completely new house. Gaudí convinced Josep that a renovation was sufficient and was also able to submit the planning application the same year. The building was completed and refurbished in 1906. He completely changed the main apartment which became the residence for the Batlló family. He expanded the central well in order to supply light to the whole building and also added new floors. In the same year the Barcelona City Council selected the house as a candidate for that year’s best building award. The award was given to another architect that year despite Gaudí’s design.Josep Batlló died in 1934 and the house was kept in order by the wife until her death in 1940 . After the death of the two parents the house was kept and managed by the children until 1954. In 1954 an insurance company named Seguros Iberia acquired Casa Batlló and set up offices there. In 1970, the first refurbishment occurred mainly in several of the interior rooms of the house. In 1983, the exterior balconies were restored to their original color and a year later the exterior façade was illuminated in the ceremony of La Mercè.In 1993, the current owners of Casa Batlló bought the home and continued refurbishments throughout the whole building. Two years later, in 1995, Casa Batlló began to hire out its facilities for different events. More than 2,500 square meters of rooms within the building were rented out for many different functions. Due to the buildings location and the beauty of the facilities being rented, the rooms of Casa Batlló were in very high demand and hosted many important events for the city.