"He toured Italy in the 1560s (working in Bologna) and was in the service of Maximilian II, Holy Roman Emperor, in Vienna from 1569 to 1576, ...
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whilst also taking commissions in Nuremberg, where he specialised in painted terracotta busts, including a self-portrait of about 1573, one of the earliest such by a sculptor.
After 1576 he moved to the royal court of Denmark (with a return to Nuremberg in 1579) where he is presumed to have worked during the 1580s and died in the early 1590s, perhaps at Uraniborg on 30 November 1591.
Unusually for a non-Italian artist, his work was praised by Giorgio Vasari." - (en.wikipedia.org 31.10.2019)