Events relating to mosaic
The citizens of Olynthus abandon their houses, with elaborate mosaic floors, when their city is attacked by Philip of Macedon

Roman mosaic is at its most lavish in the floors of Piazza Armerina, in central Sicily
The church of Santa Pudenziana in Rome begins the great tradition of Christian mosaics

The mausoleum of Galla Placidia begins Ravenna's great tradition of Christian mosaic
Justinian and Theodora, each with a retinue of attendants, face each other in mosaic from the walls of San Vitale in Ravenna
In the cathedral on Torcello, and in St Mark's, Venetian mosaics are a culmination in the west of the Byzantine tradition
Mosaic begins to yield to fresco, as the chief medium for the decoration of Christian churches
Martinus Beijerinck publishes proof that tobacco mosaic disease is caused by an infectious agent smaller than a bacterium, for which he uses the name 'virus'
Austrian artist Gustav Klimt completes his designs for mosaics in the Palais Stoclet in Brussels