സ്ക്വയർ tower is the oldest part of the Château du Colombier but the exact date of construction is unknown. It was enlarged during the 13th and 14th centuries. ൽ 2001-2002, the opening of the Hall of Frescos completed the tour of the chateau and allowed visitors to experience the ത്തിനും അതിന്റെ നവോത്ഥാന decoration (പതിനാറാമൻ നൂറ്റാണ്ടിൽ)