Kasthamandap, meaning wooden pavilion is the biggest of all the Dharmashalas in Kathmandu. It is commonly believed that the massive wooden structure was build out of the timber from a single tree. The exact date of its construction and the name of the person who built it is not known so far. However, its name has been found mentioned in the oldest ever inscription of 1134 AD.
The place has great religious and cultural significance. Many religious rituals are performed and it is often crowded with people singling devotional songs and ancient hymns. Many tourists flock around watching the activities with keen interest and wonder.