1547 CE, it is the tomb complex of Isa Khan Niyazi, an Afghan noble in Sher Shah Suri's court of the Suri dynasty, who fought against the Mughals. The octagonal tomb is positioned within an octagonal garden, which was built during his own lifetime and the reign of Islam Shah Suri, son of Sher Shah. It later served as a burial place for the entire family of Isa Khan. On the western side of the tomb lies a three-bay wide mosque, in red sandstone. The octagonal tomb bears a striking resemblance to other tombs of the Sur dynasty monuments in the Lodhi Gardens, in Delhi and demonstrates a marked progression in the development of the exquisite architectural style of the main tomb. Some of the architectural details present here were seen later in the main Humayun's tomb, though on a much grander scale, such as the tomb being placed in a walled garden enclosure. Bu Halima's Tomb and Garden: When entering the complex from the West, visitor's first enter a garden complex, known as Bu Halima's Garden, though little is known about her, and since the tomb or the raised platform where it once stood is not at the centre, it appears to be a later addition. Afsarwala Tomb and mosque: Standing southwest end of the complex, lies the Afsarwala tomb, dedicated to an unknown person. One of the marble graves inside the tomb is dated 1566-67 CE. The mosque itself can be dated to the same period judging from its siting, standing as it does adjacent to the tomb, rather than away from it. Arab Serai: Literally meaning the sarai (resthouse) for the horses, the structure stands adjacent to the Afsarwala mosque and was built by Bega Begum around 1560-1561 CE, ostensibly built for the craftsmen who came for the construction work. It could accommodate 300 Arabas. (in Persian ارابه means:Cart or Gari (vehicle)). Nila Gumbad: Standing outside the boundary of the complex is the tomb known as Nila Burj (now known as Nila Gumbad) or 'Blue Dome', so called because it carries striking blue glazed tiles. It was built by Abdul Rahim Khan-I-Khana, son of Bairam Khan also a courtier in Mughal Emperor, Akbar's court, for his servant Miyan Fahim. Fahim, who not only grew up with his son, but later also died alongside one of Rahim's own sons, Feroze Khan, while fighting against the rebellion of Mughal