St. Antoninus of Florence († 1459) was a Dominican friar who became the Archbishop of Florence in 1446. Known for his pastoral zeal, service to the poor, and expertise in canon law, he founded the priory of San Marco in Florence, which was decorated by Fra Angelico. He authored the Summa Moralis and established a charitable society under St. Martin of Tours. His feast day is May 10.
St. Raymond of Penyafort († 1275) was a Dominican friar and a renowned canon lawyer. He served as the third Master of the Dominican Order and is credited with compiling the Decretals of Gregory IX, a key collection of canon law. He is also known for his missionary work and defense of the faith. He wrote one of the first manuals for user of the inquisitors, the Directorium Inquisitoriale (1242). His feast day is January 7.
St. John Macias († 1645) was a Spanish-born Dominican friar who evangelized in Peru. Born in 1585 in Ribera, Spain, he was orphaned young and worked as a shepherd before emigrating to Lima, Peru. In 1623, he joined the Dominican Order at the priory of St. Mary Magdalene, serving as a porter for 22 years. Known for his charity toward the poor and devotion to the rosary, he lived contemporaneously with St. Martin de Porres and St. Rose of Lima in Lima. His feast day is September 18.