The design of the central sanctuary, the Maha Pho wihan (also called Maha Chedi, Thai: มหาเจดีย์), does indeed somewhat resemble the Mahabodhi temple, clearly having Indian influences. Crowning the flat roof of the rectangular windowless building are seven spires (In Thai: chet yot) which gives the temple its name: a pyramid-like spire with a square base set back from the centre surrounded by four smaller similar spires, and, set atop the two smaller annexes of the main building, two bell-shaped chedis.
The interior of the building contains a barrel vaulted corridor which leads to a Buddha statue at its end. Right and left of the Buddha statue narrow stairs lead up to the roof. In days past a bodhi tree grew on top of the roof but which was removed in 1910 CE to prevent the structure from collapse. Women should not climb up to the roof as only men are allowed to enter this part of the temple.
The exterior façades of the building feature 70, partially strongly weathered, stucco reliefs of Thewada (Devas), divine beings, the faces of whom have allegedly been modelled after relatives of King Tilokarat.