A blangkon or belangkon (Indonesian) is a traditional Javanese headdress worn by men and made of batik fabric. There are four types of blangkons, distinguished by their shapes and origins: Ngayogyakarta, Surakarta, Kedu, and Banyumasan.
Blangkons are believed to originate from the legendary story of Aji Saka. In the story, Aji Saka defeated Dewata Cengkar, a giant who owned the land of Java, by spreading a giant piece of headdress that could cover the entire land of Java. Aji Saka was also believed to be the founder of the Javanese calendar.
There are theories stating that the use of blangkon is the influence of Hindu and Islamic culture absorbed by the Javanese. The first Muslims who entered Java were people from mainland Arab and Gujarati traders. Blangkons are believed to derive from turbans worn by Gujarati traders.