Byzantine Revival architecture.
Holy Trinity Greek Orthodox Church is a Greek Orthodox Church Cathedral in the first district of Vienna, Austria, in the historic Greek neighborhood of Vienna's Innere Stadt. The neighborhood has also been known as the "Fleischmarkt".
From Wikipedia, CC BY-SA 4.0.
Stand in front of it, point your camera, and LookUp names it from where you are, with these facts on the card. Every landmark you capture turns to colour on your Vienna map.
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