The LEGO Mini Knight's Castles 40775 is a limited edition set that features a mini castle with 590 pieces, including a knight character. This set is part of the LEGO Icons theme and comes in a sealed box packaging. While it is not retired, this set is geared towards ages 18 and up, making it a unique and intricate build for adult LEGO enthusiasts. Released in 2025, this LEGO set is a must-have for collectors and fans of building toys.