El Castillo Interior, also known as Las Moradas (translated as The Interior Castle or The Mansions), is a profound work crafted by Saint Teresa of Ávila in 1577. Initially hesitant to pen her thoughts on the depths of internal prayer due to the scrutiny of the Inquisition, Teresas journey to write this transformative piece began after receiving a divine vision. In this vision, she saw a stunning crystal globe shaped like a castle, consisting of seven mansions, with the King of Glory radiating brilliance from the innermost chamber. This imagery inspired her to articulate her views on the journey of faith, likening the contemplative soul to a majestic castle with seven successive inner courts, reminiscent of the seven heavens. Teresas childhood fascination with chivalric romances and her life in the fortified city of Ávila undoubtedly shaped her rich metaphorical language. The concept of an interior life continues to resonate within Spanish thought even today. An English translation of this influential work was published in London in 1852.