Städel Museum ranks as Germany’s oldest museum foundation. Its collection offers a virtually complete survey of seven hundred years of European art from the early 14th century to the present, with focuses on the Renaissance, the Baroque, early Modern art and much more
If you're into European art, you have to go there. You'll find works of Dürer, Boticelli, Gerhard Richter, Francis Bacon, Monet, Picasso and so many more. There are sculptures, paintings, photographs, you name it.
no entrance fee for children under the age of 12. Free wifi! :)