The Old Plovdiv was made a reservation because of the characteristic features of the National Revival architecture houses, concentrated of the Three Hills - Nebet Tepe, Jambaz Tope and Texim Tepe. With their impressive appearance, magnificent internal decoration, coziness and family spirit they are embodiment of the spirit of their time. ecoration, coziness and family spirit they are embodiment of the spirit of their time. The old churches are an integral part of the Three Hills architectural ensemble.
Most of them have the same appearance as they had it at the middle of the last century. Those are "St.St. Konstantin & Elena", "St. Marina", "St. Nedelya", "St. Petka" and the "Holly Mother of God" Cathedral. There is a Roman Catholic Church in Plovdiv - "St. Ludvig". There are Protestant and Armenian-Gregorian church as well. There are two mosques in Plovdiv that remained from the time of the Ottoman invasion.
