This site covers the history of the Second Crusade in-depth. It is broken down into several categories for easier reading.

Boise State University covers much of the aftermath/results of the Second Crusade.

This site covers the Fourth Crusade in-depth. It is broken down into several categories for easier reading.

Boise State University covers the Consequences of the First Crusade from all important aspects.

From a chapter on "The Americas, Europe, and Africa Before 1492," this section describes the European societies that engaged in conversion, conquest, and commerce and discusses the motives for and mechanisms of early European exploration.

This site from the Boise State University contains a brief summary of the history of Venice during the 1200 era.