The Gregorian calendar reform of 1582, which provided the basis for the civil and Western ecclesiastical calendars still in use today, has often been seen as a triumph of early modern scientific culture or an expression of papal ambition in the wake of the Counter-Reformation. Much less attention has been paid to reform's intellectual roots in the European Middle Ages, when the reckoning of time by means of calendrical cycles was a topic of central importance to learned culture, as impressively documented by the survival of relevant texts and tables in thousands of manuscripts copied before 1500. For centuries prior to the Gregorian reform, astronomers, mathematicians, theologians, and even Church councils had been debating the necessity of improving or emending the existing ecclesiastical calendar, which throughout the Middle Ages kept losing touch with the astronomical phenomena at an alarming pace. Scandalous Error is the first comprehensive study of the medieval literature devoted to the calendar problem and its cultural and scientific contexts. It examines how the importance of ordering liturgical time by means of a calendar that comprised both solar and lunar components posed a technical-astronomical problem to medieval society and details the often sophisticated ways in which computists and churchmen reacted to this challenge. By drawing attention to the numerous connecting paths that existed between calendars and mathematical astronomy between the Fall of Rome and the end of the fifteenth century, the volume offers substantial new insights on the place of exact science in medieval culture.

Named a Best Book of 2020 by The Telegraph, The Times, and BBC History Magazine An illuminating guide to the scientific and technological achievements of the Middle Ages through the life of a crusading astronomer-monk. "Falk’s bubbling curiosity and strong sense of storytelling always swept me along. By the end, The Light Ages didn’t just broaden my conception of science; even as I scrolled away on my Kindle, it felt like I was sitting alongside Westwyk at St. Albans abbey, leafing through dusty manuscripts by candlelight." —Alex Orlando, Discover Soaring Gothic cathedrals, violent crusades, the Black Death: these are the dramatic forces that shaped the medieval era. But the so-called Dark Ages also gave us the first universities, eyeglasses, and mechanical clocks. As medieval thinkers sought to understand the world around them, from the passing of the seasons to the stars in the sky, they came to develop a vibrant scientific culture. In The Light Ages, Cambridge science historian Seb Falk takes us on a tour of medieval science through the eyes of one fourteenth-century monk, John of Westwyk. Born in a rural manor, educated in England’s grandest monastery, and then exiled to a clifftop priory, Westwyk was an intrepid crusader, inventor, and astrologer. From multiplying Roman numerals to navigating by the stars, curing disease, and telling time with an ancient astrolabe, we learn emerging science alongside Westwyk and travel with him through the length and breadth of England and beyond its shores. On our way, we encounter a remarkable cast of characters: the clock-building English abbot with leprosy, the French craftsman-turned-spy, and the Persian polymath who founded the world’s most advanced observatory. The Light Ages offers a gripping story of the struggles and successes of an ordinary man in a precarious world and conjures a vivid picture of medieval life as we have never seen it before. An enlightening history that argues that these times weren’t so dark after all, The Light Ages shows how medieval ideas continue to color how we see the world today.

Drawing upon a surprising wealth of evidence found in surviving manuscripts, this book restores friars to their rightful place in the history of English health care.Friars are often overlooked in the picture of health care in late medieval England. Physicians, surgeons, apothecaries, barbers, midwives - these are the people we think of immediately as agents of healing; whilst we identify university teachers as authorities on medical writings. Yet from their first appearance in England in the 1220s to the dispersal of the friaries in the 1530s, four orders of friars were active as healers of every type. Their care extended beyond the circle of their own brethren: patients included royalty, nobles and bishops, and they also provided charitable aid and relief to the poor. They wrote about medicine too. Bartholomew the Englishman and Roger Bacon were arguably the most influential authors, alongside the Dominican Henry Daniel. Nor should we forget the anonymous Franciscan compilers of the Tabula medicine, a handbook of cures, which, amongst other items, contains case histories of friars practising medicine. Even after the Reformation, these texts continued to circulate and find new readers amongst practitioners and householders. This book restores friars to their rightful place in the history of English health care, exploring the complex, productive entanglement between care of the soul and healing of the body, in both theoretical and practical terms. Drawing upon the surprising wealth of evidence found in the surviving manuscripts, it brings to light individuals such as William Holme (c. 1400), and his patient the duke of York (d. 1402), who suffered from swollen legs. Holme also wrote about medicinal simples and gave instructions for dealing with eye and voice problems experienced by his brother Franciscans. Friars from the thirteenth century onwards wrote their medicine differently, reflecting their religious vocation as preachers and confessors.ok of cures, which, amongst other items, contains case histories of friars practising medicine. Even after the Reformation, these texts continued to circulate and find new readers amongst practitioners and householders. This book restores friars to their rightful place in the history of English health care, exploring the complex, productive entanglement between care of the soul and healing of the body, in both theoretical and practical terms. Drawing upon the surprising wealth of evidence found in the surviving manuscripts, it brings to light individuals such as William Holme (c. 1400), and his patient the duke of York (d. 1402), who suffered from swollen legs. Holme also wrote about medicinal simples and gave instructions for dealing with eye and voice problems experienced by his brother Franciscans. Friars from the thirteenth century onwards wrote their medicine differently, reflecting their religious vocation as preachers and confessors.ok of cures, which, amongst other items, contains case histories of friars practising medicine. Even after the Reformation, these texts continued to circulate and find new readers amongst practitioners and householders. This book restores friars to their rightful place in the history of English health care, exploring the complex, productive entanglement between care of the soul and healing of the body, in both theoretical and practical terms. Drawing upon the surprising wealth of evidence found in the surviving manuscripts, it brings to light individuals such as William Holme (c. 1400), and his patient the duke of York (d. 1402), who suffered from swollen legs. Holme also wrote about medicinal simples and gave instructions for dealing with eye and voice problems experienced by his brother Franciscans. Friars from the thirteenth century onwards wrote their medicine differently, reflecting their religious vocation as preachers and confessors.ok of cures, which, amongst other items, contains case histories of friars practising medicine. Even after the Reformation, these texts continued to circulate and find new readers amongst practitioners and householders. This book restores friars to their rightful place in the history of English health care, exploring the complex, productive entanglement between care of the soul and healing of the body, in both theoretical and practical terms. Drawing upon the surprising wealth of evidence found in the surviving manuscripts, it brings to light individuals such as William Holme (c. 1400), and his patient the duke of York (d. 1402), who suffered from swollen legs. Holme also wrote about medicinal simples and gave instructions for dealing with eye and voice problems experienced by his brother Franciscans. Friars from the thirteenth century onwards wrote their medicine differently, reflecting their religious vocation as preachers and confessors.riars practising medicine. Even after the Reformation, these texts continued to circulate and find new readers amongst practitioners and householders. This book restores friars to their rightful place in the history of English health care, exploring the complex, productive entanglement between care of the soul and healing of the body, in both theoretical and practical terms. Drawing upon the surprising wealth of evidence found in the surviving manuscripts, it brings to light individuals such as William Holme (c. 1400), and his patient the duke of York (d. 1402), who suffered from swollen legs. Holme also wrote about medicinal simples and gave instructions for dealing with eye and voice problems experienced by his brother Franciscans. Friars from the thirteenth century onwards wrote their medicine differently, reflecting their religious vocation as preachers and confessors.