Ilyas Bey Mosque is a historical Islamic religious building situated in Balat Village next to the Miletus ruins in the Didim district of Aydın Province, western Turkey. It forms an essential part of the broader Ilyas Bey Complex.
The construction of the mosque was initiated by the order of Ilyas Bey, the ruler of the Turkish Menteshe emirate. While Turkish sources specify the start of construction in May and June of 1404, English sources record the year of construction as 1403, noting his rule from 1402 to 1421.
Examining the historical context, Balat village in the Büyük Menderes basin joined the territories of the Menteshe principality in the second half of the 13th century and passed to the Ottoman state in 1391. Following the defeat of the Ottomans by Timur at the Battle of Ankara, the Menteshe emirate, like other Anatolian beyliks, had its lands returned by Timur. Menteshe ruler Ilyas Bey initiated the construction of the mosque in May-June 1404 after returning to head the emirate after a twelve-year gap.
Architecturally, the Ilyas Bey Mosque lacks a narthex and is situated to the south of a courtyard featuring a fountain and surrounded on three sides by madrasah units. The square-planned structure measures 18.17 meters by 18.27 meters and is covered by a dome spanning 14 meters in diameter, resting on an octagonal drum through muqarnas-filled pendentives.
The mosque incorporates many marble blocks scavenged from the ancient ruins of Miletus, most of which were reworked and placed into the walls. The structure displays walls covered with marble both inside and out. It is noted for its unique identity that combines Greek, Roman, Byzantine, Seljuk, and Ottoman architectural styles alongside spolia materials.
The northern facade features a pointed-arch portal niche enclosing three flat-arched openings supported by two columns. The other three facades each have two pairs of windows, with iron bars on the lower ones and plaster grilles on the upper ones. Opposite the entrance stands a magnificent marble mihrab measuring 7.37 meters in height and 5.12 meters in width, framed by a muqarnas border and decorated with inscriptions and geometric floral motifs.
The minaret, located at the northwest corner, was accessed via a round-arched doorway in the prayer hall. English sources state that the brick minaret was based on Baroque architecture and influenced by Persian culture, while Turkish sources record that this minaret collapsed during the 1955 earthquake. English sources also mention that the dome was originally covered with copper rather than gold.
Damaged by natural events over time, the building suffered from a severe earthquake in the Büyük Menderes basin in the 1890s and was repaired for the first time in 1905, when the dome was covered with corrugated tiles. The mosque underwent minor repairs following the 1955 earthquake as well.
Between 2007 and 2012, the structure underwent a comprehensive restoration project initiated by an industrial enterprise named Söktaş and carried out by architect Cengiz Kabaoğlu. This restoration project, executed alongside other structures in the complex, received an award in the category of conservation of architectural heritage by Europa Nostra, an organization dedicated to safeguarding Europe's cultural heritage.
Today, visitors encounter the Ilyas Bey Mosque and Complex situated within the Miletus archaeological site. Next to the complex lie the ruins of a Byzantine-era villa featuring a bath. Also known as the Great Mosque or Friday Mosque, the building continues to stand as one of the most significant cultural heritage sites in the region.
Wikimedia research dossier · Last checked: 2026-08-31 15:15:42
