Dürer made large numbers of preparatory drawings , especially for his paintings and engravings , and many survive , most famously the Betende Hände ( English : Praying Hands , c. 1508 Albertina , Vienna ) , a study for an apostle in the Heller altarpiece .
Dürer made large numbers of other practice drawings , especially for his paintings and engravings , and many survive , most famously the Praying Hands ( 1508 Albertina , Vienna ) .