On the "Rio Don-Giovanni-Day", 20 September 2021, a concert is dedicated to the works of Sigismund Neukomm composed in and for Brazil. The programme also includes a composition by the Brazilian composer José Maurício Nunes Garcia (Rio 1767–1858), highly esteemed by Neukomm and occasionally described as "the Brazilian Mozart". He conducted the first performance of Mozart's Requiem with Neukomm's "Libera me" in the Igreja Nossa Senhora do Parto on 19 December 1819. The concert is a cooperation of Don Juan Archiv Wien with partners in Austria, Portugal, and Brazil: the Mozarteum University Salzburg, Divino Sospiro – Centro de Estudos Musicais Setecentistas de Portugal, and Musica Brasilis. Accordingly, the music will be performed in four locations: Vienna, Salzburg, Queluz/Lisbon, and Rio de Janeiro. While the partnering institutions' concerts with commentaries are recorded especially for this occasion, the performances in Vienna will be broadcast live.