St. Ignatius of Antioch:

• Anonymous Greek icon (no date): St. Ignatios of Antioch ---Holy Transfiguration Monastery, Brookline, MA, USA

St. Ildephonsus of Toledo:

• El Greco: St. Ildefonso ---National Gallery of Art, Washington, DC, USA

Pope Innocent III:

• Giotto: Dream of Innocent III ---Web Gallery of Art

Pope Innocent IV:

• Grandes Chroniques de France (XIV Century): Meeting of Pope Innocent IV and St. Louis at Cluny ---BNF

Pope Innocent VIII:

• Pollaiolo, Antonio del: Tomb of Pope Innocent VIII (bronze) ---Web Gallery of Art

Holy Innocents:

• Breviary of Martin of Aragon (XV Century): Massacre of the Holy Innocents --- BNF
• Brueghel, Pieter (the Elder): Massacre of the Holy Innocents ---James Grattan
• Giotto: Massacre of the Innocents from Scenes from the Life of Christ ---James Grattan
• Pisano, Giovanni: Massacre of the Holy Innocents (marble relief on the pulpit at St. Andrea, Pistoria) ---Web Gallery of Art
• Rubens, Peter Paul: Massacre of the Holy Innocents ---Web Gallery of Art
• da Volterra, Daniele: The Massacre of the Holy Innocents ---Web Gallery of Art

St. Irene the Great Martyr:

• Anonymous Greek icon (no date): The Great-Martyr Irene ---Holy Transfiguration Monastery, Brookline, MA, USA

Patriarch Isaac:

• School of Raphael Loggia di Raeffelo: God Appears to Isaac -- -Masterworks of the Vatican
• Follower of the Master of the Golden Bull: Isaac Blessing Jacob ---National Gallery of Art, Washington, DC, USA
• Brunelleschi, Filippo: The Sacrifice of Abraham (bronze relief) ---Web Gallery of Art
• da Caravaggio, Michelangelo Merisi: The Sacrifice of Isaac ---The WebMuseum
• Domenichino: Abraham Leading Isaac to Sacrifice --- Kimball Museum of Art
• Donatello: The Sacrifice of Isaac (marble statue) ---Web Gallery of Art
• Ghiberti, Lorenzo: Isaac Sends Esau out to Hunt (bronze relief from Porta del Paradiso, the Baptistry, Florence) ---Web Gallery of Art
• Giotto: The Benediction of Isaac --- Christus Rex
• Giotto: Isaac Rejecting Esau --- Christus Rex
• Lorrain, Claude: Landscape with the Marriage of Isaac and Rebekah --- FA
• Rembrandt: Abraham and Isaac ---The WebMuseum

St. Isaac the Syrian:

• Anonymous Russian icon: St. Isaac the Syrian ---Holy Transfiguration Monastery, Brookline, MA, USA

Prophet Isaiah:

• Anonymous French Illumination (IX Century): The Prayer of Isaiah ---Tulane University
• Breviary of Martin of Aragon (XV Century): Prophet Isaiah --- BNF
• Breviary of Martin of Aragon (XV Century): Prophet Isaiah --- BNF
• Breviary of Martin of Aragon (XV Century): Prophet Isaiah --- BNF
• John of Berry's Petites Heures (XIV Century): St. James the Great with the Prophet Isaiah --- BNF
• Duccio di Buoninsegna: The Nativity with Prophets Isaiah and Ezekiel ---National Gallery of Art, Washington, DC, USA
• Michelangelo: Isaiah ---Web Gallery of Art
• Raphael: Prophet Isaiah --- FA

Ishmael:

• Lorrain, Claud: The Departure of Hagar and Ishmael --- FA

St. Isidore the Egyptian:

• Anonymous Coptic Icon: St. Isidore --- CN

St. Isidore of Seville:

• Murillo, Bartolome: San Isidoro ---UC-Davis