Many studies have shown that images—their presence in the daily lives of the faithful, the means used to control them, and their adaptation to secular uses—were at the heart of the Reformation crisis in northern Europe.  But the question as it affects the art of Italy has been raised only in highly specialized studies.

In this book, Alexander Nagel provides the first truly synthetic study of the controversies over religious images that pervaded Italian life both before and parallel to the Reformation north of the Alps. Tracing the intertwined relationship of artistic innovation and archaism, as well as the new pressures placed on the artistic media in the midst of key developments in religious iconography, The Controversy of Renaissance Art offers an important and original history of humanist thought and artistic experimentation from one of our most acclaimed historians of art.

The use of perspective in Renaissance painting caused a revolution in the history of seeing, allowing artists to depict the world from a spectator's point of view. But the theory of perspective that changed the course of Western art originated elsewhere-it was formulated in Baghdad by the eleventh-century mathematician Ibn al Haithan, known in the West as Alhazen. Using the metaphor of the mutual gaze, or exchanged glances, Hans Belting-preeminent historian and theorist of medieval, Renaissance, and contemporary art-narrates the historical encounter between science and art, between Arab Baghdad and Renaissance Florence, that has had a lasting effect on the culture of the West.

In this lavishly illustrated study, Belting deals with the double history of perspective, as a visual theory based on geometrical abstraction (in the Middle East) and as pictorial theory (in Europe). How could geometrical abstraction be reconceived as a theory for making pictures? During the Middle Ages, Arab mathematics, free from religious discourse, gave rise to a theory of perspective that, later in the West, was transformed into art when European painters adopted the human gaze as their focal point. In the Islamic world, where theology and the visual arts remained closely intertwined, the science of perspective did not become the cornerstone of Islamic art. Florence and Baghdad addresses a provocative question that reaches beyond the realm of aesthetics and mathematics: What happens when Muslims and Christians look upon each other and find their way of viewing the world transformed as a result?

The question of whether true friendship could exist in an era of patronage occupied Renaissance Florentines as it had the ancient Greeks and Romans whose culture they admired and emulated. Rather than attempting to measure Renaissance friendship against a universal ideal defined by essentially modern notions of disinterestedness, intimacy, and sincerity, in this book Dale Kent explores the meaning of love and friendship as they were represented in the fifteenth century, particularly the relationship between heavenly and human friendship.

She documents the elements of shared experience in friendships between Florentines of various occupations and ranks, observing how these were shaped and played out in the physical spaces of the city: the streets, street corners, outdoor benches and loggias, family palaces, churches, confraternal meeting places, workshops of artisans and artists, taverns, dinner tables, and the baptismal font.

Finally, Kent examines the betrayal of trust, focusing on friends at moments of crisis or trial in which friendships were tested, and failed or endured. The exile of Cosimo de’ Medici in 1433 and his recall in 1434, the attempt in 1466 of the Medici family’s closest friends to take over their patronage network, and the Pazzi conspiracy to assassinate Lorenzo and Giuliano de’ Medici in 1478 expose the complexity and ambivalence of Florentine friendship, a combination of patronage with mutual intellectual passion and love—erotic, platonic, and Christian—sublimely expressed in the poetry and art of Michelangelo.