According to Localyte.com The Sidi Saiyyed Mosque, built in 1573, is one of the most famous mosques of Ahmedabad. It was built by Sidi Saeed an Abyssinian in the retinue of Bilal Jhajar Khan, General in the army of the last Sultan Shams-ud-Din Muzaffar Shah III of Gujarat Sultanate. The mosque was built in the last year of the Sultanate of Gujrat.
The mosque is entirely arcuated and is famous for beautifully carved ten stone latticework windows (jalis) on the side and rear arches. The rear wall is filled with square stone pierced panels in geometrical designs. This intricately carved stone window is called the Siddi Sayyed Jali. Siddi Sayyed Jali is unofficial symbol of city of Ahmedabad. It is a fine example of Indo-Saracenic architecture. This jali inspired the design of the logo of the Indian Institute of Management Ahmedabad.