Sign without number from the "Vienna - the city introduces itself" series of signs, an initiative established in 1956 as part of the Vienna Festival, which shows significant places in the city. The serial number is displayed at the bottom of the sign.
Note that this sign is slightly different from other signs from the same series - the text appears in it in two languages (German and English), the phrase "Vienna - A city introduces itself" does not appear at the bottom, but the initiating factor - the Vienna Tourist Board.
The sign is on a Baroque-style house in the historic center of Vienna, an area that has become a UNESCO World Heritage Site.
The name of the house is given because of the statue on it (you can see it in the picture of the building, on the left side of the building, above the first floor), which indicates the Holy Trinity.
The house was photographed that day Click for a larger image
The building is part of the European Heritage Project, as can be seen from the sign above the current sign
THE EUROPEAN HERITAGE PROJECT Click for a larger image