Istana Surosowan, situated in Banten Lama, Indonesia, is a historical palace complex that once served as the royal residence and administrative center of the Sultanate of Banten. Constructed during the 16th century, the palace was a symbol of the sultanate's power and influence in the region. The complex featured traditional Javanese architectural elements, including wooden structures, elevated platforms, and intricately carved decorations. Istana Surosowan played a crucial role in the political and cultural life of Banten, hosting royal ceremonies, meetings, and receptions. Today, while much of the palace complex lies in ruins, efforts are underway to preserve and restore this important cultural heritage site, allowing visitors to explore Banten's rich history and royal legacy.