The online lecture "Bizantijas mozaīkas" takes place on 16 November 2026 via ZOOM tiešraide. The lecture explores Byzantine mosaic as a monumental form of painting in the medieval Byzantine world, combining the ascetic spirituality of Christian imagery with solemn splendour and luxury. It explains how tesserae with gold leaf created a radiant, almost surreal light, and how glass cubes were set into wet cement or lime at slight angles so candlelight and sunlight would reflect unevenly across the surface. The programme also examines frontal figures, solemn poses, expressive eyes, and the theological meaning carried by colours, clothing and gestures. Attention is given to the protective layer of gold between transparent glass sheets, as well as the flourishing of Byzantine mosaics during Justinian’s reign, the “Golden Age”, and after the iconoclastic period.