| Castillet / Castellet | |
| Building Type: | Fortification |
| Location City: | Perpignan |
| Location Country: | France |
| Coordinates: | 42.7006°N 2.8939°W |
| Architect: | Guillem Guitard |
| Start Date: | 1368 |
| Stop Date: | 1542 |
| Owner: | City of Perpignan |
The Castillet (in Catalan; Valencian pronounced as /kəstiˈʎet/ or Castellet in Standard Catalan, meaning small castle) is an ancient fortification and city gate located in Perpignan (Pyrénées-Orientales, France). Today, this monument, a strong symbol of the city, has become a museum: Museu Català de les Arts i Tradicions Populars (Catalan Museum of Popular Arts and Traditions).
The Castillet was made of three parts: the big Castillet, the small Castillet (former city gate), and a polygonal bastion. The bastion was destroyed in the early 20th century, but the big and small Castillet were saved from demolition.