A black glazed earthenware from Jackfield in Shropshire

A type of Japanese pottery traditionally from Bizen province, characterized by a reddish-brown color; significant hardness due to high-temperature firing; absence of glaze; and markings resulting from wood-burning kiln firing.

A style of Japanese pottery, originating in present-day Gifu prefecture.

A type of decorated ceramic ware, featuring embossed (or sometimes stencilled) figures or motifs in contrasting colour on a plain ground.

plural of Samian ware

Tin-glazed earthenware (majolica) of the kind originally manufactured in Orvieto, Italy, in the 13th century.

(number theory) The problem of whether each natural number k has an associated positive integer s such that every natural number is the sum of at most s natural numbers raised to the power k.

plural of Orvieto ware

enameled terracotta