Almost from the very beginning of his stay in Warsaw Muchanow had belonged to the aristocratic artistic salons, particularly that of the pianist Maria Kalergis. Maria's estranged first husband died in 1863–10 years younger than her, and hoping to raise his social position by marrying her, Muchanow proposed and was accepted. The wedding took place in Baden-Baden on 30 September 1863. Muchanow's resignation of his career to marry her and the resulting financial strains, however, caused Maria to have a nervous breakdown and it was only some time later that she was able to go toSaint Petersburg to obtain his appointment as administrator of imperial palaces in the Kingdom of Poland and President of the Warsaw Theatre Directorate. Also supported by governor Fiodor Berg in this request, Muchanow received these posts on 27 April 1868. He and his wife then brought about a rise in theatrical life in Warsaw – with the aid of the Directorate's administrative directors Mikołaj Bojanowski and Bogumił Foland, Muchanow was able to give the city's theatres settled financing systems and find an additional income source in the form of tax concessions in the gardens around the theatres. He also managed to overhaul the city's theatre buildings and oversee the opening of the Summer Theatre. In these efforts, Muchanow was able to count on the support of governor Berg as well as major Polish cultural figures such as Stanisław Moniuszko, Jan Chęciński, Aleksander Narcyz Przezdziecki, Józef Kenig and Władysław Bogusławski. He invited Helena Modrzejewska to Warsaw, granting her various privileges, such as selection of the repertoire – and she appeared onstage there in plays of Shakespeare, Słowacki, Schiller and Fredro. The operatic repertoire, swelled by songs by Moniuszko, also prospered. Muchanow ensured the creation of a team of actors and Modrzejewska and actors already well-known to Warsaw audiences such as Alojzy Żółkowski, Jan Królikowski, Wiktoryna Bakałowiczowa, Salomea Palińska and Aleksandra Rakiewiczowa were joined by newcomers such as Romana Popiel, Wincenty Rapacki, Bolesław Leszczyński, Marian Prażmowski and Edward Wolski. This period became known as "the age of stars". Muchanow's success declined from 1874 with the death of Maria on 22 June and of Jan Chęciński on 30 December. Modrzejewska thus lost her protectoress and, getting entangled in problems with the censors and other company members, she soon left for the United States. Rapacki, Bogusławski and Emil Deryng could not fill Modrzejewska's role as head of the company, nor could Deryng's daughter Maria. Muchanow made a last attempt at glory by making Jan Tatarkiewicz director in 1878 and taking on actors such as Jadwiga Czaki, Adolfina Zimajer, Józef Kotarbiński and Honorata Leszczyńska, but neither measure had success and Muchanow began putting on little theater and opera, focusing instead on the ballet company.
Retirement and death
He retired from his post as head of the directorate on 12 June 1880 and soon moved to countryside; in 1882 marrying Waleria Pignan. Died in May 29, 1897 in Przemęczany village near town Miechów.
