The Siphnian Treasury was a building at the Ancient Greek cult centre of Delphi, erected to hold the offerings of the polis, or city-state, of Siphnos. It was one of a number of treasuries lining the processional route through Delphi, erected to win the favor of the gods and increase the prestige of the donor polis. It was one of the earlier surviving buildings of this type, and its date remains a matter for debate, but was probably between 530 and 480 BC.