Vegan and Vegetarian are on the menu, but the same kitchen also prepares what you avoid, so cross-contamination is possible. Tell staff what you react to, and ask how your dish is prepared before you order.
Bio-Pizzeria Vero in Vienna, whose own tagline reads organic, vegan and gluten free, serving pizza with vegan and vegetarian options alongside the rest. The site says goodbye to its ninth district address and points to Josefstadt and Währing, so check before going. Ask the staff, the kitchen has the final word.