Otto Wagner Church (Steinhof)

Otto Wagner's Jugendstil church on the Steinhof hospital grounds — a luminous masterpiece of the Vienna Secession, with white marble cladding, a green copper dome that earned it the nickname 'the lemon,' and stained glass by Kolo Moser. Built for the patients of a psychiatric hospital, it was radically designed with their needs in mind, down to rounded edges and accessible details. For visitors willing to travel to the city's edge, it's a quietly extraordinary building — one of the purest expressions of Viennese Jugendstil, where Wagner's modern vision met genuine human care, crowning a hilltop above the city.