A very ornamented türbe (mausoleum) is that of Hüdavent Hatun. The pictures are from different visits. In 2019 I came to the conclusion that a sulpher-like yellow is the best description of the colour of the (thracyte) stone of the Hüdavent Hatun, with white marble accents.

It has a single storey in an octagonal plan with a 16-sided drum, topped by what seems a pyramidical roof from the outside, but is spherical from the inside.