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Johann Philipp Neumann (27 December 1774 – 3 October 1849) was an Austrian physicist, librarian and poet.
Born in Trebitsch in Moravia, he completed his studies at the University of Vienna. In 1803, he was appointed as a professor of physics at his local lyceum. He was transferred to the University of Graz in 1806, where he became a rector in 1811.
In 1815, he was appointed as a professor at the Polytechnic Institute in Vienna (now the Vienna University of Technology). He founded a library here in 1816, which he directed until 1845.
Neumann was a friend of the composer Franz Schubert. Neumann adapted Georg Forster's translation of Shakuntala as a libretto for an opera, which Schubert commenced in 1820 but never competed. Neumann, a liberal-minded churchman, was interested in simple music designed to appeal to "the widest possible congregation". To this end, he wrote the text of 8 hymns and a translation of the Lord's Prayer, and commissioned the Deutsche Messe from his friend in 1826.
He retired in 1844, and died in Vienna in 1849.