The architecture of Poland was also transformed. Over one hundred buildings have survived which provide a testament to the popularity of the new, monumental style of Romanesque architecture. The style was influenced by Cologne, particularly early on. Among those is the Crypt of Saint Leonard at Wawel Hill in Kraków and the Cathedral of Płock, built in 1144. Many similar churches from that era, usually round or square with semicircular apses, can be found throughout Poland, in towns like Ostrów Lednicki or Giecz. Another example is the brick Church of St. Jacob in Sandomierz, founded in 1226 by Iwo Odrowąż and built by his nephew St. Jacek Odrowąż (its campanile however was built in early Gothic style in the 14th century). At the Cathedral in Gniezno is an important example of Romanesque art, the bronze Gniezno Doors (c. 1175), which is recognized as the first major work of Polish art with a national theme. Their relief depicts eighteen scenes of the life and death of Saint Adalbert.