St. Stephen's Cathedral, Vienna
Matthias participated in the lengthy Palm Sunday ceremony in Vienna in 1490, although he had felt so ill that morning that he could not eat breakfast. Around noon, he tasted a fig that proved to be rotten and he became very agitated and suddenly felt faint. The next day he was unable to speak. After two days of suffering, Matthias died in the morning of 6 April. According to Professor Frigyes Korányi, Matthias died of a stroke; Dr. Herwig Egert does not exclude the possibility of poisoning. Matthias's funeral was held in St. Stephen's Cathedral, Vienna and he was buried in Székesfehérvár Cathedral on 24 or 25 April 1490.