Lý Thánh Tông
There were some additions and be perfected in 1105 according to "Đại Việt sử ký toàn thư":"Yi You (乙酉), (Long Phù) the fifth year (1105 AD), Song Chongning the fourth year. [...] At that time, the emperor (Lý Thánh Tông) repaired Diên Hựu pagoda to be more beautiful than before, dug Liên Hoa Đài lake (Lotus Station's lake), called Linh Chiểu lake. Outside the lake, there was a corridor running around, outside the corridor dug another lake called Bích Trì Lake, built bridges to cross. In front of the temple yard built stupa."