The 15th century witnessed a huge range of new developments in both fresco and oils. Building on the achievements of Medieval Byzantine art as well as the courtly 14th century International Gothic style, Italian quattrocento painters switched in general from illuminated manuscripts and other forms of book illustration, to panel paintings and other large-scale works like fresco painting. Likewise decorative art such as stained glass and mosaic art also declined. Although tempera remained an important medium, oil painting - introduced from Northern Europe (by artists like Antonello da Messina) attracted a growing number of adherents.