The Kangla Fort is a significant historical site and former:

Royal palace
Military garrison
Religious center
Trade hub

The Kangla Fort is a significant historical site and former royal palace. It is located in Imphal, the capital of Manipur, India. The fort was built in the 14th century by the Meitei king Meidingu Pamheiba. It was the seat of the Manipuri monarchy until 1891, when it was captured by the British. The fort is now a museum and a popular tourist destination.

The Kangla Fort is a large complex of buildings and fortifications. It is surrounded by a moat and a wall. The fort is divided into two parts: the inner fort and the outer fort. The inner fort is the older part of the fort and contains the royal palace. The outer fort is the newer part of the fort and contains the military barracks and other buildings.

The Kangla Fort is a significant historical site because it was the seat of the Manipuri monarchy for centuries. It is also a popular tourist destination because of its beautiful architecture and its historical significance.

The other options are incorrect because the Kangla Fort was not a military garrison, religious center, or trade hub.