Guess the city!

Can you guess where the teacher was last weekend?

These are some clues:

. I was in a European city. It's a capital city.

. It's got about 800,000 inhabitants, many of them are immigrants.

. It's got lots of canals and bridges, you can sail by boat.

. Van Gogh and Rembrandt are two very famous painters from there.

This city is ...