What is a gopuram in ancient architecture?*1 pointsanctum sanctorumentrance towerwallpillared hall

A gopuram is an entrance tower in ancient Indian architecture, particularly associated with Hindu temples. It is typically elaborately decorated and serves as a monumental entry point to the temple complex. Gopurams are often characterized by towering structures adorned with intricate carvings and sculptures depicting a variety of deities and mythological scenes. They symbolize the transition from the earthly realm to a sacred space and are an integral part of South Indian temple architecture.

In summary, amidst the given options, the most fitting answer is "entrance tower," as gopurams primarily function as grand gateways to temple sanctuaries.