kaftan

(Also spelled caftan). A man’s robe, usually reaching to the ankles, with long sleeves. Silk and velvet kaftans were worn by sultans, princes and high officials during the Ottoman Empire. Web resources here and here.

UntitledOttoman Child’s Kaftan with Detachable Sleeves. Brocaded silk.  16th c. Topkapı Museum, Istanbul, Türkiye.