Complex sentence: While Asoka is considered the Mahabodhi temple's founder, the current structure dates from the Gupta Empire, in the 5th--6th century CE. The pyramidal temple probably replaced an open pavilion that had been constructed around the tree and the Asokan platform.
Split into simpler sentences: While Asoka is considered the Mahabodhi temple's founder, the current structure dates from the 5th--6th century. The previous pyramidal temple probably replaced an open pavilion that had been constructed around the tree and the Asokan platform.