Photo credits on the homepage:

Oslo City Hall, Credits: VisitOSLO/Nancy Bundt

The Oslo Opera House and Bjørvika, Credits: VISITOSLO/Sabine Zoller

Oslo City Hall, Credits: VisitOSLO/Matjaz Intihar

The Royal Palace, Credits: VISITOSLO/Matjaz Intihar

Panoramic image of the Oslofjord, VISITOSLO/Sabine Zoller

The Oslofjord, Credits: VISITOSLO/Sabine Zoller 

Burgtheater, Vienna. Jeremy Thompson CC BY 2.0

Ratshaus, Vienna. Steve Collis CC BY 2.0

Heldenplatz (Heroes'Square), Hofburg Palace, Vienna. Jorge Láscar CC BY 2.0

Naturhistorisches Museum, Vienna. Jozef Kotulič CC BY 3.0
Wiener Staatsoper, Vienna. Peter Siroki CC BY 2.0
Neue Burg, Vienna. Dennis Jarvis CC BY-SA 2.0
Burgtheater, Vienna. Jeremy Thompson CC BY 2.0
Karlskirche, Vienna. Marcus Winter CC BY 2.0
Dorotheum, Vienna. C.Stukhard
Gloriette at Schönbrunn 2, Vienna. Dominik Bartsch CC BY 2.0
Gloriette at Schönbrunn 1, Vienna. Radu Rosca CC BY 2.0
Burgtheater, Vienna. Problemkind CC BY 2.0
The Philarmonics.
Old building of Danube University Krems, Lower Austria. Wachau 2 CC BY-SA 3.0
Danube in the Wachau Valley. Lonezor CC BY-SA 3.0
Naturhistorisches Museum, Vienna. Pedro J Pacheco CC BY-SA 3.0

New Acropolis Museum and Acropolis. runner310 CC BY 2.0 
Acropolis, Athens. darkensiva CC BY 2.0
New Acropolis Museum.  VisitGreece CC BY-NC-SA 2.0
Plaka. Jon&Alison CC BY 2.0 
New Acropolis Museum inside. Giorgos Vitsaropoulos VisitGreece CC BY-NC-SA 2.0 

Odeion of Herodes Atticus. Nick Stenning CC BY-SA 2.0 

2011 European Heritage Awards Ceremony, Ruben Renaud

Het Concertgebouw, Amsterdam. Leander Lammertink
Royal Palace, Amsterdam. Bureau Monumenten & Archeologie, Gemeente Amsterdam

Westergasfabriek, Amsterdam. Westergasfabriek