Histogram of the mass of 271 Byzantine glass weights.

The mass distribution of Byzantine glass weights from the British Museum (BM) and the Biblothèque nationale de France (BnF) coincide roughly with the weight values of Byzantine gold coinage: 4.5 g (nomisma), 2.25 g (semissis), 1.5 g (tremissis). Data were binned at 0.1 g intervals.