| Byzantine | The artistic tradition of the Eastern Roman Empire, characterized by gold-backed mosaic tesserae, hieratic figuration, and religious iconography serving Orthodox Christian worship, as in the San Vitale mosaics. |
| Gothic architecture | A medieval Christian architectural style using pointed arches, ribbed groin vaults, flying buttresses, and rose windows to achieve great height and light-filled interiors, exemplified by Chartres Cathedral. |
| Romanesque | An 11th- to 12th-century European architectural style with thick walls, rounded arches, and small windows, used primarily in churches and influenced by Roman, Islamic, and migratory artistic traditions. |
| Illuminated Manuscript | A handwritten book decorated with interlace, figural imagery, gold leaf, and pigment on vellum, produced in monastic workshops; the Lindisfarne Gospels is a key Unit 3 example. |
| Linear Perspective | A Renaissance technique in which parallel lines converge at a single vanishing point to create the illusion of rational three-dimensional space on a flat surface, as in Raphael's School of Athens. |
| enconchado | A colonial Mexican decorative technique combining inlaid shell pieces with lacquered wood, tempera, and resin, blending Asian lacquerware, indigenous shell-inlay, and European painting traditions. |
| biombo | A multi-paneled folding screen format originating in Asia and adopted in colonial Mexico, combining Asian structure with European subject matter, as in the Screen with the Siege of Belgrade and Hunting Scene. |
| hybridization | The blending of European, indigenous, and sometimes Asian forms, materials, and iconography in colonial Spanish American art, producing new visual expressions that cannot be reduced to any single source tradition. |
| patronage | The financial and social support of corporate or individual patrons that shaped the content, form, scale, and display of artworks from altarpieces and reliquaries to royal portrait cycles and colonial devotional images. |
| altarpiece | A painted or sculptural work displayed on or behind a church altar, commissioned for devotional or commemorative purposes; examples include the Isenheim Altarpiece and the Merode Altarpiece. |
| Protestant Reformation | A 16th-century religious movement that rejected Catholic figural imagery, leading to iconoclasm in northern Europe and a shift toward secular genres including landscape, still life, and portraiture. |
| Counter-Reformation | The Catholic Church's 16th-century response to Protestantism, using emotionally powerful and theatrically dramatic art to reinforce doctrine and inspire devotion, driving the Baroque style in southern Europe. |
| Theotokos | Greek for 'God-bearer' or 'Mother of God,' the theological title for the Virgin Mary in Eastern Christianity, used to identify her role in Byzantine icons and mosaics. |
| affective spirituality | A religious practice emphasizing emotional and personal engagement with sacred images, encouraging laypeople to identify with the suffering of Christ or the grief of the Virgin, as in the Röttgen Pietà. |