Hilbert’s Problems

December’s Site of the Month is Hilbert’s 2000 Lecture.
At the International Congress of Mathematicians in 1900, David Hilbert presented ten important unsolved problems. When his lecture was published it contained 23 problems, several of which have now been solved (see the Wikipedia site for more historical information).
This month’s site is a copy of the published lecture–it was presented in the Mathematics Education part of the congress, and so is addressed to teachers of mathematics.