Ибн Хордадбех
Unified Silla was a golden age of art and culture. During this period, long-distance trade between Unified Silla and the Abbasid Caliphate was documented by Persian geographer Ibn Khordadbeh in the "Book of Roads and Kingdoms". Buddhist monasteries such as the World Heritage Sites Bulguksa temple and Seokguram Grotto are examples of advanced Korean architecture and Buddhist influence. Other state-sponsored art and architecture from this period include Hwangnyongsa Temple and Bunhwangsa Temple. Persian chronics described Silla as located at the eastern end of China and reads 'In this beautiful country Silla, there is much gold, majestetic cities and hardworking people. Their culture is comparable with Persia'.