Karabaş Mustafa Ağa Mosque, Ottoman mosque in Tophane, Istanbul, Turkey.
Karabaş Mustafa Ağa Mosque is an Ottoman-era building in Tophane, Istanbul, featuring a square floor plan with stone and brick walls. A single dome crowns the structure, accompanied by a minaret with one balcony overlooking the surrounding neighborhood.
Founded in the 16th century by Karabaş Mustafa Bin Korkut Bey, this mosque shaped the spiritual life of the quarter for hundreds of years. The building underwent complete reconstruction in the 1950s, returning it to use after significant damage.
The mosque takes its name from its founder Karabaş Mustafa Ağa and served as a gathering place for Sufi spiritual practices over centuries. Today it remains an active worship space where visitors can observe how local communities continue to use this spiritual center.
As an active place of worship, visitors should observe respectful behavior and be mindful of prayer times when planning a visit. The location in Beyoğlu's Hacımimi district makes it easily accessible as part of a walking tour through the neighborhood.
The building originally functioned as a complex religious community center with schools and prayer areas alongside special spaces for ceremonies. Over time, different religious orders used the site for their own spiritual practices, reshaping how visitors experienced the space.
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