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As Archbishop of Lima, he tirelessly evangelized South America and served the indigenous peoples.

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A deacon and martyr of Spain, known for his unwavering faith and his eloquent testimony before his executioners.

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A philosopher who converted to Christianity and became its first great apologist, eventually martyred for refusing to sacrifice to idols.

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On the octave day of Christmas, the Church celebrates the Solemnity of Mary, the Holy Mother of God, honoring her role as the Mother of the Savior and the start of the civil New Year with a focus on peace.

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A pivotal figure of the early Church, instrumental in combating Arianism and organizing famine relief. His principles significantly influenced Eastern monasticism.

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A young catechist in Uganda who was martyred along with his companions for their refusal to compromise their faith and purity.

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A Pope who advocated for the reconciliation of those who had lapsed during persecution and was eventually martyred.

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A monk, cardinal, and reformer, he was a powerful voice for Church renewal and advocate for clerical discipline.

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A Greek missionary who, with his brother Methodius, translated the liturgy into Slavonic and created the Cyrillic alphabet.

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A Roman layman miraculously chosen as Pope, he served for 14 years and was martyred during the persecution of Decius.

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The founder of the Passionists, he was a mystic who dedicated his life to promoting devotion to the Passion of Christ.

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A Jesuit known as the 'Second Apostle of Germany,' he played a vital role in the Counter-Reformation.

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The feast of the three Archangels mentioned by name in Scripture, who serve as messengers and protectors of God's people.

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A philosopher who converted to Christianity and became its first great apologist, eventually martyred for refusing to sacrifice to idols.

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A young noblewoman and nursing mother martyred in Carthage; her prison diary is one of the earliest accounts of Christian martyrdom.

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The first Polish Pope, he traveled extensively, calling all to 'Be not afraid' and opening the Church to the modern world.

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A Pope who was exiled to the mines of Sardinia and resigned his office to allow for a successor, dying as a martyr.

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One of the Twelve Apostles, known as 'the Zealot,' who preached the Gospel with great fervor before being martyred.

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A close companion of St. Paul and the first Bishop of Ephesus, known for his youth and dedicated service to the early Church.

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The Seven Holy Founders of the Servite Order (Bonfilius, Alexis, Manettus, Amadeus, Hugh, Sostene and Buonagiunta) were seven men of the town of Florence who became bound to each other in a spiritual friendship and started the Servite Order in the 13th century.

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The Assumption of Mary is a Catholic dogma that Mary, at the end of her earthly life, was taken body and soul into heaven, defined by Pope Pius XII on 1 November 1950 in his apostolic constitution Munificentissimus Deus. It is celebrated on 15 August.

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The precursor of Jesus who prepared the way of the Lord through his preaching of repentance and baptism in the Jordan.

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The Feast of the Holy Cross, Feast of the Exaltation of the Holy Cross, or Feast of the Cross, commemorates the True Cross. On 13 September, 335, the Constantinian Basilica over the Holy Sepulchre was consecrated in Jerusalem.

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In Catholicism, the veneration of the Holy Name of Jesus (also Most Holy Name of Jesus, Italian: Santissimo Nome di Gesù) developed as a separate type of devotion in the early modern period, in parallel to that of the Sacred Heart.

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The Transfiguration of Jesus is an event described in the New Testament where Jesus is transfigured and becomes radiant in glory upon a mountain.

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Trinity Sunday is the first Sunday after Pentecost in the Western Christian liturgical calendar, and the Sunday of Pentecost in Eastern Christianity.

1896–1977 · Contemporary

Abhay Charanaravinda Bhaktivedanta Swami Prabhupada (IAST: Abhaya Caraṇāravinda Bhaktivedānta Svāmī Prabhupāda; Bengali: অভয় চরণারবিন্দ ভক্তিবেদান্ত স্বামী প্রভুপাদ; 1 September 1896 – 14 November 1977) was a spiritual, philosophical, and religious teacher from India who spread…

550–552 · Medieval

Aaron of Aleth (died after 552), also called Saint Aihran or Eran in Breton, was a hermit, monk and abbot at a monastery on Cézembre, a small island near Aleth, opposite Saint-Malo in Brittany, France.

800–813 · Medieval

Aaron of Auxerre (fl. 800) was a bishop of Auxerre (perhaps 794–807). His relics are venerated in the Church of Saint-Germain in Auxerre, where his feast day is celebrated on 28 September. He is included in the roster of saints in the book Les Petits Bollandistes.

300–304 · Early Church

Julius and Aaron (also Julian) were two Romano-British Christian saints who were martyred around the third century AD. Along with Saint Alban, they are the only named Christian martyrs from Roman Britain.

550–552 · Medieval

Aba I (or, with his Syriac honorific, Mar Aba I) or Mar Abba the Great was the Patriarch of the Church of the East at Seleucia-Ctesiphon from 540 to 552.

400 · Early Church

Jacobite Arab Synaxarium or Synaxaire Arabe-Jacobite is a volume containing biographies of several saints and it utilized by the Syriac Orthodox Church. It was initially published into French in 1904 in the Patrologia Orientalis by René Basset.

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Abadir and Iraja are saints in the Coptic Church and the Roman Catholic Church. They are reported to have been children of the sister of Basilides, "the father of kings". According to their legend, Abadir and Iraja fled from Antioch to Alexandria.

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Jacobite Arab Synaxarium or Synaxaire Arabe-Jacobite is a volume containing biographies of several saints and it utilized by the Syriac Orthodox Church. It was initially published into French in 1904 in the Patrologia Orientalis by René Basset.

201–201 · Early Church

Abaskhiron the Soldier or Eskhayron the Soldier is a Coptic martyr and saint. The name "Abaskhyron" is derived from two words, The honorific title "Abba" which means father, is given to him out of respect (despite his young age in martyrdom).

700–707 · Medieval

Abbo II of Metz was the thirty-fifth bishop of the Diocese of Metz, following Landry of Metz. He is commemorated with a feast day of 15 April. Abbo served as bishop from 697–707.

850–860 · Medieval · Benedictines

Abbo of Auxerre was a Benedictine abbot and bishop of Auxerre. He had been a monk, and later abbot, of the Abbey of Saint-Germain d'Auxerre, and succeeded his brother Heribald of Auxerre as bishop of Auxerre. He resigned from the see in 859.

945–1004 · Medieval · Benedictines

Abbo or Abbon of Fleury (Latin: Abbo Floriacensis; c. 945 – 13 November 1004), also known as Saint Abbo or Abbon, was a monk and abbot of Fleury Abbey in present-day Saint-Benoît-sur-Loire near Orléans, France.

570–620 · Medieval

Abbán of Corbmaic (Old Irish: Abbán moccu Corbmaic, Latin: Abbanus; d. 520?), also Eibbán or Moabba, was a saint and abbot. He is associated, first and foremost, with the Mag Arnaide (Moyarney or Adamstown, County Wexford, near New Ross).

750 · Medieval

Abdalong of Marseilles was a bishop of the Diocese of Marseille in the 8th century during the reign of Charles Martel. He has a popular cult without official recognition, which holds an informal feast day for him on March 1.

400–418 · Early Church

Abdas, (also Abda, Abdias, and Audas) was bishop of Susa in Iran. Socrates of Constantinople calls him "bishop of Persia". He was executed under the orders of shah Yazdegerd I after refusing to rebuild a Zoroastrian fire temple that he had destroyed.

342 · Early Church

Abdisho, ʾAbdisho, Abdishu, or ʿAbd Īshōʿ (Syriac: ܥܒܕܝܫܘܥ, Arabic: عبد يشوع) meaning 'servant of Jesus' in Syriac, is a masculine given name. The name is most predominantly used by Syriac Christians of West Asia, namely the Assyrians.

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In Medicine, abdo is short for abdominal. As a name, notable people called Abdo, Abdou, Abdouh or Abdu include: Abdo/Abdu/Abdou/Abdoun/Abdoh/Abbud/Aboud/Aboodi... is A masculine Arabic name, and a nickname for Abdul .

250 · Early Church

Abdon and Sennen, variously written in early calendars and martyrologies Abdo, Abdus, and Sennes, Sennis, Zennen, are recognized by the Catholic Church and Eastern Orthodox Church as Christian martyrs, with a feast day on 30 July.

700–764 · Medieval · Benedictines

Abel (fl. 744–747) served as the Bishop of Reims in Francia, now modern-day France. He has sometimes been venerated as a saint in the Catholic Church, particularly by the Bollandists.

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Abeluzius is a saint of the Ethiopian Orthodox Tewahedo Church. He is commemorated with a feast day of January 15. Little else is known of the person. It has been speculated that the name may be a typographical error for "Abba Lucius", a Syro-Roman name.

200–200 · Early Church

Abercius of Hieropolis (Ancient Greek: Ἀβέρκιος; died c. 167) was a Christian clergyman from Hierapolis at the time of Roman emperor Marcus Aurelius. He is maybe identical to an author who is called Avircius Marcellus in later sources.

-1–50 · Early Church

Abgar V (c. 1st century BC – c. AD 50), called Ukkāmā (meaning "the Black" in Syriac and other dialects of Aramaic), was the King of Osroene with his capital at Edessa. Abgar was described as "king of the Arabs" by the Roman historian Tacitus, a near-contemporary source.

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The Martyrology of Rabban Sliba is a book containing the names and feast days of a number of martyrs of the Syriac Orthodox Church. The book was composed by the monk Rabban Sliba in the late thirteenth century or early fourteenth century.

307–322 · Early Church

Abibus of Edessa (Syriac: ܚܒܝܒ ܐܘܪܗܝܐ, romanized: Ḥabbīḇ Ōrhāyā; Greek: Άβιβος της Εδέσσης; Church Slavonic: абиб от едеса; Arabic: حبيب الرهانيا, romanized: Ḥabīb al-rhanīyya; c.