most (not all, some contributions are QTVR-only due to historical reasons)
many, but depends on photographer's choice of file upload (newer event = more likely to work) and your device's capabilities. You may experience slow playback, distorted images or unexpected browser quitting if there is only limited memory/GPU power available.
Wawel Cathedral – in full, the Cathedral Basilica of St Stanislaus and St Wenceslaus – is Poland's national sanctuary in the city of Krakow. It has a 1000-year history and was the traditional coronation site of Polish monarchs. It is the cathedral, and thus the mother church, of the Archdiocese of Krakow. Pope John Paul II considered being buried here.
Sigismund's Chapel -
The so-called Sigismund's Chapel (Kaplica Zygmuntowska in Polish) is one of the most notable pieces of architecture in Kraków. Built as a tomb chapel of the last Jagiellons, it was hailed by many historians of art as the most beautiful example of Toscan renaissance north of the Alps. Financed by king Sigismund I the Old, the chapel was built between 1519 and 1533 by Bartolomeo Berrecci. A square-based chapel with a golden dome houses the tombs of its founder king Sigismund, as well as king Sigismund II Augustus and Anna Jagiellonka. The design of internal sculptures, stuccos and paintings was carried out by some of the most renowned artists of the epoch, including the architect himself, Georg Pencz, Santi Gucci and Hermann Vischer.