The first Church of St. George was destroyed in 1142, during the troubles that followed the death of Sobeslav.[53] A Romanesque building was then erected, which is the finest building in that style of architecture in Bohemia. Though here also restorations have taken place, the church has, on the whole, retained its ancient character, and it is well worth the attention of the traveller. It contains the graves of several of the most ancient rulers of Bohemia and of their wives. The ancient frescoes in this church and the chapels of St. Ludmilla--where that saint and Princess Mlada, the first abbess of St. George's convent, are buried--and of St. Anne require particular notice. During the recent restorations the stucco ornaments that concealed the old Romanesque doors and windows have been removed. Of great interest are the four very ancient towers on the Hradcany Hill, which date from the time of Ottokar II. and have already been mentioned. They overlook the Jeleni Prikop (Stag's Ditch), and are reached by the Jiriska Ulice, passing through buildings that are used as Government offices. These towers were used as prisons, and the White Tower in particular, which has been compared to the Bastille and the Tower of London, was the principal State prison of Prague. The leaders of the Protestant movement against Ferdinand I., Bishop Augusta, the head of the Bohemian brethren, the Bohemian leaders who were decapitated in 1621, the partisans of Charles of Bavaria (1743), and many others were imprisoned here.