Dervishes are members of a Sufi Muslim sect who have taken a vow of poverty. Since the order was founded in the 12th century, expressions of asceticism have sometimes included wearing heavily patched and patchwork clothing.
Top image: Dervish costume, via Berlin State Museums (I B 180), under Creative Commons license. © Foto: Ethnologisches Museum der Staatlichen Museen zu Berlin - Preußischer Kulturbesitz; Fotograf/in: Claudia Obrocki
Bottom image: Vasily Vereshchagin, Dervishes in Festive Dress, 1868-1870, via Wikimedia Commons