Saint
A person who is seen as very holy can be declared a saint by a formal process, called canonization.  Formal canonization is a lengthy process often taking many years, even centuries. The first step in this process is an investigation of the candidate's life, undertaken by an expert. After this, the report on the candidate is given to the bishop of the area and more studying is done. It is then sent to the Congregation for the Causes of Saints in Rome.