In the year 18 BBY, close to Bel City located on the Outer Rim planet of Mon Cala, Ferren Barr, a Jedi Padawan, along with his group of acolytes, operated a cave refuge.
This cave refuge was initially featured in Darth Vader (2017) 13, a 2017 comic book created by the writer Charles Soule and the artist Giuseppe Camuncoli.