An inscription found on the Sun temple at Gaya, dating to the Sultanate period (specifically 1359 AD), mentions the name of Sultan Firuz Shah Tughlaq twice. The inscription records the construction of a 'serai' (inn) by a local official during Firuz Shah Tughlaq's reign. Firuz Shah Tughlaq was known for his interest in public works and administrative activities, and inscriptions from his reign are found in various parts of his empire.