The Ryazan Kremlin occupies a promontory above the confluence of the Oka and Trubezh rivers, and is the oldest part of the city. The complex contains several significant buildings from the fifteenth to eighteenth centuries, all now forming part of an open-air museum. The Cathedral of the Assumption (Uspensky Sobor), built between 1693 and 1699, dominates the ensemble with its ornate baroque facade and five blue domes. The belfry standing beside it is the tallest historic structure in Ryazan.
Within the Kremlin grounds you will find the Cathedral of the Nativity of Christ, the Palace of Archbishop Oleg — now housing exhibits on the city's history and culture — and various ecclesiastical buildings in various states of restoration. The riverside views from the Kremlin walls are among the best in the city, looking out over the floodplains and the bell tower of the Transfiguration Monastery across the water.