Jamdani is a type of muslin that comes from Bangladesh where it is painstakingly hand-woven.
These intricate patterned fabrics are made with a supplementary weft (an additional thread that is woven across the background cloth). The result is a highly decorative cloth that is sold at Jamdani Haat – a market where the cloth is sold wholesale to retailers. It is hard work and pays little to the creator but the fabric has UNESCO Intangible Heritage of Humanity status, and you can see why in this fascinating Google Arts & Culture essay.
You can read more of the history of the textile, and see some examples, in this article from My Grandma’s Legacy website.