Excerpts from Books and Wikipedia
"Maximilian expanded the influence of the House of Habsburg through war and his marriage in 1477 to Mary of Burgundy, the heiress to the Duchy of Burgundy, though he also lost the Austrian territories in today's Switzerland to the Swiss Confederacy. Through marriage of his son Philip the Handsome to eventual queen Joanna of Castile in 1498, Maximilian helped to establish the Habsburg dynasty in Spain, which allowed his grandson Charles to hold the thrones of both Castile and Aragon. . . . Maximilian had appointed his daughter Margaret as both Regent of the Netherlands and the guardian and educator of his grandsons Charles and Ferdinand (their father, Philip, having predeceased Maximilian), and she fulfilled this task well. Through wars and marriages he extended the Habsburg influence in every direction: to the Netherlands, Spain, Bohemia, Hungary, Poland, and Italy. This influence would last for centuries and shape much of European history. The Habsburg Empire would survive as the Austria-Hungary Empire until it was dissolved 3 November 1918 . . ." [Wikipedia]