Hungary, Budapest, St Stephens Basilica, interior of the dome.

Hungary, Budapest, St Stephens Basilica, interior of the dome.

Hungary, Budapest, St Stephens Basilica, interior of the dome.

Hungary, Budapest, St Stephens Basilica, interior of the dome.

Italy, Lazio, Rome, Celian Hill, church of Santa Maria in Domnica, Byzantine mosaic in the apse.

Scotland, Glasgow, Mackintosh Glasgow, Queen's Cross Church, pulpit detail.

Scotland, Glasgow, Mackintosh Glasgow, Queen's Cross Church, blue heart window.

Austria, Salzburg, Kollegienkirche or Collegiate Church, one of the side altars.

Austria, Salzburg, Salzburg Dom or Cathedral, Ceiling detail.

Poland, Krakow, Rynek Glowny or Main Market Square, St Mary's Church also known as St Marys Basilica, The Veit Stoss Altarpiece.

Poland, Warsaw, The Church of the Holy Cross, Resting place of Frederic Chopin's heart.

Germany, Saxony, Dresden, Frauenkirche or the Church of Our Lady in Neumarkt Square, a section of the interior from the dome stairway.