"The Sanctuary of the Heart" is a creative dressing and social collaboration game that focuses on the construction of Islamic architectural art and spiritual space. Players, as virtual designers, participate in decorating a globally shared "Sanctuary of the Heart" (representing a personal spiritual mosque), embodying Islamic geometric aesthetics and spiritual purity through custom domes, arches, and lighting elements. The gameplay encourages users to collaborate with Muslim players from around the world, such as jointly lighting virtual candles or hanging "prayer flags" (representing global unified worship), and synchronizing Ramadan or Eid al-Fitr activities in real time to strengthen cross-cultural bonds. The game integrates historical elements, such as referencing Ottoman and Andalusian architectural styles, and incorporates Islamic psychological concepts like "purification of the heart" (Tazkiyah), guiding players to reflect on their inner faith through the dressing process. This module aims to bridge geographical distances, creating an inclusive sacred space that fosters a sense of belonging and unity within the global community while educating users on the role of Islamic art in connecting the sacred with the secular.