What is special about the mosque of ibn tulun?

The Mosque of Ibn Tulun, located in Cairo, is notable for being one of the oldest and largest mosques in Egypt, dating back to the 9th century. It features a unique architectural style with a mix of Abbasid and local influences, including its distinctive large courtyard and the spiral minaret, which is one of the earliest examples of this design. Additionally, the mosque's vast area and intricate decorative elements, such as stucco and tile work, showcase the artistic achievements of the period. Its historical significance is further enhanced by its relatively unchanged state, offering a glimpse into early Islamic architecture.