Canonization in the Catholic Church is the formal process of recognizing a deceased person as a saint. It's a rigorous procedure beginning with a Church investigation into the individual's life. This involves gathering evidence of holiness, such as miracles attributed to their intercession and a life lived in accordance with Christian virtues. This initial investigation is a recognized stage, followed by further processes, including a rigorous examination of their writings and actions. If sufficient evidence is found, the individual is beatified, a preliminary recognition of their holiness. Final canonization, signifying full recognition of sainthood within the Church, requires a further, extensive process and culminates in a formal declaration by the Pope.