Today it is used for temporary art exhibitions. Around 1929 it was suggested that the Villa Doria Pamphili could be annexed to the new state of Vatican through the Lateran Treaty, but this proposal was not adopted in the final version of the Treaty. New constructions extended and altered the "Villa Vecchia" which was given a Romanesque styled façade that is not wholly successful. For the first time, Medieval sculptures were added to the Doria-Pamphili collection of Classical antiquities. At the turn of the 20th century, Art Nouveau interiors were added by Prince Doria Pamphili. The "Casino del Bel Respiro", long secluded from public use, was bought by the Italian State in 1957 and used as the seat of a Ministry. Today its collection of antiquities and sculptures is open to the public as a museum. The park has an area of 1.8 km². It was bought in 1965–1971 by the City of Rome from the Doria-Pamphilii-Landi family. The park's facilities include sites for bird-watching and jogging, and it is much frequented by the inhabitants of Rome, especially on weekends. The two sections of the extended villa grounds are divided by a road built for the Olympic games of 1960 as part of the "Via Olimpica", linking E.U.R. with the Olympic Stadium: the road runs partly in a narrow defile. In celebration of the Jubilee Year of 2000, a curved and arching pedestrian bridge by Ove Arup was built to join the two sections more amenably.