University of St. Andrews (UK)
University of St. Andrews: Beginnings of Set Theory
The University of St. Andrews offers a wonderful introduction to set theory that makes the topic interesting and understandable. Includes numerous links to related philosophers, mathematicians, and topics.
University of St. Andrews (UK)
University of St. Andrews: History of Set Theory
This page, which is provided for by the University of St. Andrews, traces the history of Set Theory as well as the concept of infinity and the infinite set.