The Soltaniyeh Dome is a historic structure located in Soltaniyeh, Iran. Built in the 14th century, it is part of a larger complex that served as a mausoleum for Oljaytu, a Mongol ruler. The dome is notable for its impressive size and intricate tile work, showcasing the architectural style of the period. This UNESCO World Heritage site features a unique octagonal shape and stands at approximately 50 meters tall. The dome is surrounded by a series of smaller domes and structures, reflecting the artistic and cultural achievements of the Ilkhanate era.