This two-storied hexagonal structure has its narrow stairways at the northeast side. The lower portion has arched walls joining the pillars around. The upper story has alternate arch and rectangular windows. The dome is multi layered like that of the temples.
Like many other structures among the ruins, the name probably doesn't suggest the erstwhile function of this building. According to archeologists in all probability this would have been a watchtower than a band tower.
To the immediate east of this you would find the three-sided Mosque structure.
Band tower in the Dannayaka Enclosure at Hampi