Újbuda (lit. New Buda) is the 11th district of Budapest (Hungarian: Budapest XI. kerület), Hungary. It is the most populous district of Budapest with 137,426 inhabitants (2008). Until the 1890s, Újbuda’s present territory was a field south of the historical town of Buda. The construction of a new residential area started in the 1900s, the present district was formed in 1930.[3] From 1880 to 1980, Újbuda’s population increased from 1,180 to 178,960.[4] There are boulevards, avenues with tram lines, and communist-era housing estates in the district. Line 4 of the Budapest metro passes through Újbuda.