something, as a novel, painting, or building, of interest or value primarily because it evokes or epitomizes a particular period of history.
Origin of period piece
First recorded in 1925–30
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
an object, a piece of music, a play, etc, valued for its quality of evoking a particular historical period: often one regarded as of little except historical interest
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012