Short answers, pulled from the story.
Francesco Fiorentino was an Italian Renaissance sculptor and architect from Florence who is recognized as the earliest representative of the Renaissance in Poland. He arrived in Kraków around February 1502 at Prince Sigismund's request and led the rebuilding of Wawel Castle in the Renaissance style, transforming a Gothic royal residence into one that became a model for the region.
Francesco Fiorentino probably appeared for the first time in Kraków in February 1502, arriving at the invitation of Prince Sigismund, who later became King of Poland as Sigismund I the Old. Sigismund brought Fiorentino and an entire team of Florentine artists with him from Hungary.
Fiorentino led the rebuilding of two wings of Wawel Castle after it burned in 1499. He worked on the western wing, called the Queen's House, from 1502 to 1507, and then on the northern wing from 1507 until his death in 1516. He also designed the three-level galleries enclosing the large castle courtyard, which is considered the most beautiful Renaissance courtyard in Central Europe.
The tomb of Jan Olbracht, King of Poland from 1492 to 1501, sits in Wawel Cathedral. The tomb figure was carved in the Gothic style by sculptor Stanislaw Stwosz, and Fiorentino built the surrounding architectural and sculptural niche between 1501 and 1505. The niche is richly ornamented and echoes works by Bernardo Rosselino from earlier in the fifteenth century.
Francesco Fiorentino died on the 16th of October 1516 in Kraków. His unfinished projects at Wawel were taken over by Bartolomeo Berrecci, born in Pontassieve, Italy in 1480, who managed the works until his own death in 1537, after which Berrecci's collaborators carried on.
Fiorentino's works are described as pure Tuscan Renaissance and are noted for their precision. He drew freely from classical all'antique traditions without strict adherence to classical rules. His style and compositions are closely connected to the arts of Florence, which is also reflected in his nickname, Fiorentine.