<P> The building was first to use its unique combination of red sandstone and white marble, and includes several elements of Indian architectural, like the small canopies, or chhatris surrounding the central dome, popular in Rajasthani architecture and which were originally covered with blue tiles . </P> <P> While the main tomb took over eight years to build, it was also placed in centre of a 30 - acre (120,000 m) Char Bagh (Four Gardens), a Persian - style garden with quadrilateral layout and was the first of its kind in the South Asia region in such a scale . The highly geometrical and enclosed Paradise garden is divided into four squares by paved walkways (khiyabans) and two bisecting central water channels, reflecting the four rivers that flow in jannat, the Islamic concept of paradise . Each of the four square is further divided into smaller squares with pathways, creating into 36 squares in all, a design typical of later Mughal gardens . The central water channels appear to be disappearing beneath the tomb structure and reappearing on the other side in a straight line, suggesting the Quranic verse, which talks of rivers flowing beneath the' Garden of Paradise' . </P> <P> The entire tomb and the garden is enclosed within high rubble walls on three sides, the fourth side was meant to be the river Yamuna, which has since shifted course away from the structure . The central walkways, terminate at two gates: a main one in the southern wall, and a smaller one in the western wall . It has two double - storey entrances, the West gate which used now, while the South gate, which was used during Mughal era, now remains closed . Aligned at the centre on the eastern wall lies a baradari, literally a pavilion with twelve doors, which is a building or room with twelve doors designed to allow the free draught of air through it, finally on the northern wall lies a hammam, a bath chamber . </P> <P> Tomb and mosque of Isa Khan: Several monuments dot the pathway leading up to the tomb enclosure from the main entrance in the West . Prominent among them is one that pre-dates the main tomb itself, by twenty years . Constructed in 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 . </P>

The tomb of humayun was made by mcq