Hauz Khas Fort, is a historical monument located in the Hauz Khas Complex in South Delhi, India. It was part of a larger medieval complex that included a madrasa, a mosque, and a large water reservoir (known as the "Hauz") built during the reign of the Delhi Sultanate. History and Establishment: Established: The Hauz Khas Fort dates back to the 13th century during the reign of Alauddin Khilji (r. 1296–1316), the second ruler of the Khilji dynasty of the Delhi Sultanate. Purpose of the Complex: Alauddin Khilji constructed a large reservoir to supply water to his newly founded capital, Siri. This reservoir was known as the Hauz-i-Alai or Khilji's Tank. Over time, the reservoir silted up and fell into disrepair. Revival: In the 14th century, Firoz Shah Tughlaq (r. 1351–1388), another Delhi Sultan, restored the water reservoir and added new structures around it, such as the madrasa (Islamic seminary), tombs, and pavilions. His contributions led to the fort complex taking its current shape. Architecture: The fort and its surroundings follow a blend of Indo-Islamic architecture. The tomb of Firoz Shah, which is located within the complex, is a prime example of this style. The madrasa is another significant feature, with its long arcaded halls overlooking the reservoir. Features of the Fort Complex: Hauz (Water Tank): Originally constructed by Alauddin Khilji, the tank was an essential water source for the residents of the Siri Fort area. Firoz Shah's Tomb: This domed structure is the final resting place of Firoz Shah Tughlaq, situated in the middle of the complex. Madrasa: Built by Firoz Shah, the madrasa was an important center for Islamic learning. It is L-shaped and overlooks the reservoir. Mosque: A small mosque is located near the madrasa, used by the scholars and students. Pavilions and Ruins: Scattered around the complex are stone pavilions, ruins, and structures that add to the historical ambiance. Today, the Hauz Khas Fort and its surrounding structures are a popular tourist destination, offering a glimpse into Delhi's medieval past, with the reservoir area now a serene green space.