Bayerische Staatsoper in Munich (Timus in Turandot and Ramfis in Aida). He sang the part of Ramfis also at Terme di Caracalla in Rome. At Polish National Opera, Siwek appeared as Zaccaria in Nabucco, Narbal in Les Troyens (cond. by Valery Gergiev) and Raimondo in Lucia di Lammermoor. In 2012, Siwek returned to Bayerische Staatsoper in Munich to sing Wurm in Luisa Miller and Fafner in Siegfried (cond. by Kent Nagano). He sang Galitsky at the season opening performance of Prince Igor at Staatsoper in Hamburg and Commandore at Deutsche Oper in Berlin during the Festival Castell de Peralada. Siwek began season 2013, the year of Verdi, with Philip II in Don Carlo and Zaccaria in Nabucco at Polish National Opera. He returned to La Scala as Grand Inquisitor and to Bayerische Staatsoper as Sparafucile. He also made his debut at Opernhaus in Zurich as Il Commendatore (cond. by Fabio Luisi) and appeared at Bolshoi Theatre as Philip II in Don Carlo. In 2014, he again sang at Bayerische Staatsoper (Gremin, cond. by Kirill Petrenko; Sparafucile, cond. by Marco Armiliato) and in Zurich (Ramfis in a new production of Aida). Together with Polish National Opera he made a guest performance in Tokio. He also sang Timur at Teatro Lirico in Calgari and Arena di Verona. He sang the title role in a concert performance of Verdi’s Attila at Polish National Opera. The next year witnessed his performances in Halka (Stolnik) at Polish National Theatre, in Der fliegende Holländer (Daland) at National Theatre in Tokio and in Nabucco (Zaccaria) at New Israeli Opera in Tel Aviv. In 2016, he added the title part of Boris Godunov to his repertoire, which he sang at Grant Theatre in Poznań. He also appeared as Raimondo in Lucia di Lammermoor at Paris Opera. In 2017, Siwek sang Heinrich in Lohengrin at Paris Opera, Fiesco in Simon Boccanegra in Concertgebouw, as well as Galitsky in Prince Igor and Tsar Ivan the Terrible in The Maid of Pskov at Bolshoi Theatre in Moscow. In 2018 he appeared, among others, in Aida in Teatro Real in Madrid as well as Nabucco and Aida in Arena di Verona. In the opening performance of 243rd artistic season in Bolshoi Theatre he had his debut as Boris in Boris Godunov. He also recorded Moniuszko’s operas. In the next year, together with Placido Domingo, Siwek was one of the performers at Verdi