Matthias's bride Beatrice of Naples had arrived in Hungary in late 1476, and Matthias had married her in Buda on December 22 of that year.

The new Queen soon establishes a rigid etiquette, making direct contacts between the King and his subjects more difficult.

According to Bonfini, Matthias also "improved his board and manner of life, introduced sumptuous banquets, disdaining humility at home and beautified the dining rooms" after his marriage.

According to a contemporaneous record, around this time Matthias's revenues amount to about five hundred thousand florins, half of which derive from the tax of the royal treasury and the extraordinary tax.

Matthias concludes an alliance with the Teutonic Knights and the Bishopric of Ermland against Poland in March 1477.

However, instead of Poland, he declares war on Emperor Frederick after he learns that the Emperor has confirmed Vladislaus Jagiellon's position as King of Bohemia and Prince-elector.