Makers of everything from mugs to sculptural ceramics will gather Saturday at this first annual event.

The Union Project, an arts, enterprise and events center, has counted pottery among its missions since it was founded in a former Highland Park church.

Appreciators of ceramics are invited to the marketplace, and to watch some of Pittsburgh's best clay artists demonstrate their skills on the potter's wheel and in hand-building techniques, according to a press release.

The Mother of All Pottery sales takes place 10 a.m.-4 p.m. this Saturday. The sale is part of the Union Project's welcome-spring weekend, also including a house party with live music, to be held 5-8 p.m. tomorrow.

The Union Project is located at 801 N. Negley Ave.