Castle Square is a historic public square in Caernarfon, Wales, situated in front of Caernarfon Castle. The square is surrounded by a mix of medieval and modern buildings, including the Castle Square Vaults pub, the old town hall, and several shops and cafes. At the center of the square stands a large stone statue of Prince Llywelyn the Great, a 13th-century Welsh prince. The square hosts various events and festivals throughout the year, including the Caernarfon Food Festival and the Galeri Caernarfon Festival.