Initially the objects shown were nearly always mundane. However, from the mid-century "pronkstillevens" ("ostentatious still lifes"), which depicted expensive and exotic objects and had been developed as a subgenre in the 1640s in Antwerp by Flemish artists such as Frans Snyders and Adriaen van Utrecht, became more popular. The early realist, tonal and classical phases of landscape painting had counterparts in still life painting. Willem Claeszoon Heda (1595–c. 1680) and Willem Kalf (1619–1693) led the change to the "pronkstilleven", while Pieter Claesz (d. 1660) preferred to paint simpler "ontbijt" ("breakfast pieces"), or explicit "vanitas" pieces.