The Tomb of Oljaytu is a significant historical site located in Iran, built in the early 14th century. It serves as the mausoleum for Oljaytu, a Mongol ruler of the Ilkhanate dynasty. The tomb is renowned for its impressive architecture, featuring a large dome and intricate tile work that reflects the artistic achievements of the period. This structure is situated in the city of Sultaniyah, which was once a thriving center during Oljaytu's reign. The tomb is part of a UNESCO World Heritage site, recognized for its cultural importance and architectural innovation, showcasing the blend of Persian and Mongol influences.