Apartments in Rentals Dalszinhaz utca 10, Budapest, District VIadd to favorites Uniquely situated in front of the Opera House in Budapest city center, the apartment Callas Opera Zonaflat the network is an ideal place for both business travelers and tourists who want to discover all the charm of the Hungarian capital. The apartment Calla Opera, located on the first floor, has two large bedrooms with double beds (one room is also equipped with a sofa bed), two bathrooms, a large kitchen with sofa bed.