Worst pizza I ever had was my first night on my first time in Venice in 1983. Ordered a seafood pizza, since I was in Venice after all, and got a dry pizza shell slathered in olive oil with little bits of fish and shellfish more or less glued onto it with the olive oil. No cheese, no sauce, just pizza shell and seafood, nothing more. Shell was inedible and the seafood not much better. Cost me a bundle too when I was travelling on a very modest budget.