 At the same time as his successes in Paris , Meyerbeer , as a Prussian Court Kapellmeister ( Director of Music ) from 1832 , and from 1843 as Prussian General Music Director , was also influential in opera in Berlin and throughout Germany . He was an early supporter of Richard Wagner , enabling the first production of the latter 's opera , Rienzi . He was commissioned to write the patriotic opera Ein <unk> in <unk> to celebrate the reopening of the Berlin Royal Opera House in 1844 and wrote music for certain Prussian state occasions . 
