The first pizza in today's or in the broader sense was already produced in the 18th century. At that time only topped with olive oil, tomatoes, oregano or even basil, but still certainly to be seen as the first pizza or perhaps the first pizza bread.
The first cheese and tomato pizza, also known as Margherita, could probably be enjoyed in Naples at the end of the 19th century. After that, more and more different ingredients - some intentional, some certainly rather experimental - were added to the pizza, so that today we are already almost overwhelmed by a normal selection in a normal pizzeria.