The years 1279-1300 are engraved on the tomb, and the sign in this mausoleum says:

Rules of Visiting Holy Place

1. It is recommended to visit separately by men and women, follow order and line.

2. On visiting shrines in all religions it is necessary to cover shoulders and legs. Kindly wear appropriate clothes and headdress which would be genuine politeness and respect to the Sacred and delicate courtesy to national culture.

3. It is prohibited to step and sit on tombs. Speak …

I couldn’t find much information on this memorial complex (although there are lots of pictures online), except that it includes two mausoleums, one dating to the 14th century, and a relatively new mosque.

Shayhantaur Memorial Complex, Tashkent, posted earlier: