Ladnu, also Ladnun, is a city and a municipality in Nagaur district in the Indian state of Rajasthan. It is a Tehsil headquarters of Nagaur district. It is the city of Jain temples and one of the most visited pilgrim places of Jain community after Shri Mahaveerji. Ladnun is famous for Jain Vishva Bharati University, Jain temples of exquisite marble work, Ramanand gaushala and other old temples of religious and architectural importance. This city is also famous as the birthplace of sacred Jain Muni Aacharya Tulsi. The excursions from Landnun within 15–20 km are Dungar Balaji, Salasar Balaji Dham, Tirupati Balaji at Sujangarh.