The marble inscription above the doorframe records the essentials plainly: construction began in 1891–1892 by order of Sultan Abdülhamit II, when Chios still belonged to the Ottoman Empire and was administered as part of the Vilayet of the Archipelago. This was an island with a long Muslim presence, its community concentrated in the town itself, and the new mosque was one expression of that life. It is one of only three former mosques still standing on Chios — the others are the Osmaniye Mosque and the Mecidiye Mosque — survivors of a religious landscape that the twentieth century would almost entirely erase. None of the three is used for Islamic worship today.

The mosque fell silent because of one of the great upheavals of the modern Aegean. In the aftermath of the First World War, the Treaty of Lausanne of 1923 mandated a compulsory exchange of populations between Greece and Turkey, uprooting hundreds of thousands of people from homes their families had held for generations. Muslims left Chios; Orthodox Christians arrived. The mosque, no longer needed for prayer, became shelter instead — it housed a displaced Armenian family, refugees of the Armenian Genocide who had landed on Chios with nothing. The initials they cut into the stone are still there. A building raised to gather one community became a roof over the heads of another that had lost everything.

The most haunting detail is the inscription above the mihrab, the niche that once pointed worshippers toward Mecca. Its Arabic text reads, in translation, "each time Zacharias goes in the altar where Mary takes place" — a reference to the Virgin Mary and to the high priest Zacharias visiting Solomon's Temple. Mary and Zacharias are revered in Islam and in Christianity alike, and the line gestures back to the Jewish temple of Jerusalem. In a single panel, on a single wall, three of the world's faiths brush against one another. The main prayer hall was later torn down, leaving the rectangular shell under its roof, but that inscription endures — a quiet argument that the traditions which fought so bitterly across these waters share more than they admit.

The Bayrakli Mosque sits in the heart of Chios town, a short walk from the harbor and the archaeological museum, and it asks more of a visitor than most monuments do. It is Ottoman architecture on a Greek island, an Islamic building inscribed with Christian and Jewish memory, a place of worship that became a refuge and then a relic. Recently restored and opened to the public, it stands as a reminder that Chios was never a single story. The island has been Genoese and Ottoman and Greek; its people Muslim, Christian, and Jewish; its buildings repurposed again and again. To read the stones of the Bayrakli Mosque is to read all of that at once.