structural:scholar_edition, structural:expansion
Marriages and offspring

Maximilian was married three times, but only the first marriage produced offspring:

The marriage produced three children, of whom only two survived:

The drive behind this marriage, to the great annoyance of Frederick III (who characterized it as "disgraceful"), was the desire of personal revenge against the French (Maximilian blamed France for the great tragedies of his life up to and including Mary of Burgundy's death, political upheavals that followed, troubles in the relationship with his son and later, Philip's death). The young King of the Romans had in mind a pincer grip against the Kingdom of France, while Frederick wanted him to focus on expansion towards the East and maintenance of stability in newly reacquired Austria. But Brittany was so weak that it could not resist French advance by itself even briefly like the Burgundian State had done, while Maximilian could not even personally come to Brittany to consummate the marriage.

In addition, he had several illegitimate children, but the number and identities of those are a matter of great debate. Johann Jakob Fugger writes in Ehrenspiegel (Mirror of Honour) that the emperor began fathering illegitimate children after becoming a widower, and there were eight children in total, four boys and four girls.