Gieng Thien Quang, Van Mieu Temple, Ha Noi - Heaven Clarity Well (Giếng Thiên Quang). Entrance to the third courtyard is through the dominating Khuê Văn Các (constellation of literature), a large pavilion built in 1802. Central to this courtyard is the Thien Quang Tinh ('Well Of Heavenly Clarity'), either side of which stand two great halls which house the true treasures of the temple.