Giovanni Battista Trevano

Giovanni Battista Trevano (born in Lugano, Switzerland, died 1644 in Krakow, Poland) was an Italian-speaking architect who worked in Poland as royal architect for King Sigismund III Vasa, of the Vasa dynasty, which ruled Poland at the time.

Trevano started working in Poland around 1600. He was one of the team of architects and craftsmen who rebuilt the Royal Castle in Warsaw, on the basis of the old Gothic castle of the Masovian princes, which had already been completely remodeled by Italian architects in the second half of the sixteenth century. New work was undertaken in the years 1598-1619. He was not alone in this project: Giacomo Rodondo, Paolo del Corte and Mateo Castelli were all involved in remaking the castle into a new Baroque structure, on its imposing site along the bank of the river Vistula. The castle, much altered over the years, was bombed and dynamited by the Nazis as a symbol of Polish culture and was rebuilt in the years 1971–1988 as a national monument.

In Kraków, on the Wawel hill, following a fire in 1595, Trevano rebuilt the state apartments of the Royal Castle for Sigismund III Vasa.

Also on the Wawel hill, in the Cathedral Church of St Wenceslas, which has been repeatedly reconstructed around the 11th-century shrine of St. Stanislaus of Szczepanów, Trevano built the shrine-mausoleum with the crossing dome, supported on four piers (1626–29).

The first Baroque church built in Poland was the Church of St. Peter and Paul on Ulica Grodzka, erected by order of Sigismund III Vasa for the Jesuits in the years 1597—1619. It was designed by Giovanni de Rossi as a cruciform basilica with a domed crossing and completed by Trevano. As with Jesuit churches throughout Catholic Europe, its façade is a close variant of that provided by Giacomo Della Porta for the Church of the Gesù, the Jesuit Mother Church in Rome.

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