Pope Francis spent his final days celebrating Holy Week, the seven days leading up to Easter Sunday. Francis, the 266th head of the Catholic Church, died Monday, the Vatican confirmed. His death came just a day after Easter and nearly a month since his release from a lengthy hospital stay.

The cause of Pope Francis’ death was a stroke that led to a coma and “irreversible heart failure,” the Vatican said. The Holy See press office on Monday released a declaration of death report from a Vatican City medical official that outlined Francis’ medical history.