Complex sentence: The ornate interior and exterior of the church were painted between 1847 and 1849 by Zahari Zograph, a popular Bulgarian painter of the time, who also painted the central church of the Rila Monastery, the largest monastery in Bulgaria.
Split into simpler sentences: The ornate interior and exterior of the church was painted in 1847-1849 by Zahari Zograph, a popular Bulgarian painter of the time. Zograph also paint the central church of the Rila Monastery, the largest monastery in Bulgaria.