We can have an idea of the oud evolution by taking a look
over the pictures below, arranged in chronological order.
Mesopotamian terracotta relief's showing lute type instruments from the second millennium BC.
Muse playing a Lute(?), late 4th century BC., Greece
�nvention of al'ud, in Mecca, 685 a.d.
Stuttgart Psalter, ca.830 a.d.
Cantigas de Santa Maria, (Spanish, ca.1270).
Leonardo (Associate): An Angel in Red with a Lute (Before 1506)