The application of the recently developed thermoluminescent methodof pre-dose dating to thirty-seven glazed ceramics, purporting to have been manufactured during the T'ang Dynasty in China (A.D. 618-906), is reported. The modern origin of eight of these pieces is established. The remaining twenty-nine authentic pieces are discussed with respect to the accuracy of dating possible for such wares. The criterion for authenticity judgment commonly used for this material, that of glaze <i>crackleur, is discussed critically and shown to be of only limited reliability.