The document provides information about three historical sites in Bangladesh: Ahsan Manzil palace, Lalbagh Fort, and Sonargaon. It describes the construction and history of Ahsan Manzil palace, built in 1859-1872 as the residence of the Dhaka Nawab family. It then summarizes the key parts of Lalbagh Fort, including the mosque, tomb of Pari Bibi, and Diwan-i-aam palace, before concluding with a brief overview of Sonargaon's history from its origins as the Buddhist kingdom of Suvarnagrama through periods of Muslim and British rule.