He spent two years in Graz , in the workshop of his other maternal uncle , the sculptor Philipp Jakob Straub .
Messerschmidt grew up in the Munich home of his uncle , the sculptor Johann Baptist Straub , who became his first master .
Messerschmidt spent two years in Graz , in the workshop of Messerschmidt 's other maternal uncle , the sculptor Philipp Jakob Straub .
Messerschmidt grew up in the Munich home of his uncle , the sculptor Johann Baptist Straub , who became his first master .