Originally Humayun Mahal had been single story with the Diwan-e-Khana Durbar Hall in its middle over which there was a dome. To transform Humayun Mahal, Chisholm removed the tower, added a first floor and Madras terraced roof. He also added a facade that matched the Khalsa Mahal, which can be seen from the Wallajah Salai. To compensate for removing the dome he also added a new eastern entrance, also in the style of the Khalsa Mahal, that faces the beach. Political influence
