Talatal Ghar, Palace in Sivasagar, India

Talatal Ghar is a palace in Sivasagar in India, composed of seven stories with three underground levels and four above ground, all connected by narrow passages. The structure rises vertically through multiple floors and shows a combination of functional spaces and representative halls.

The complex was erected between 1751 and 1769 during the rule of the Ahom dynasty and served simultaneously as a residential compound and military fortress. The construction reflects the need to combine royal representation with defensive functions.

The name Talatal Ghar refers to the three underground floors added by King Rajeswar Singha, who ruled from 1751 to 1769. The palace's chambers are arranged along a long east-west corridor, with smaller wings running north to south, and the layout resembles Assamese domestic planning while its ornament shows Mughal influence. Surviving reliefs on the interior and exterior once depicted hunting scenes, floral designs, gods and goddesses.

The three underground floors are sealed and filled, so visitors see only the exposed ground storey and the remains of upper levels. The complex stands on a grassy lawn about 4 km from Sivasagar; the ground floor once held stables, store rooms and servants' quarters. A 2015 ground-penetrating survey by IIT Kanpur found no evidence of the secret tunnels.

A 2015 ground-penetrating radar survey by IIT Kanpur and the Archaeological Survey of India at Talatal Ghar and Kareng Ghar found no trace of the secret tunnels the sources describe, so their existence remains unproven. Excavations in 2000–2001 instead uncovered a brick platform, long walls, a pathway and a terracotta drain.