Charting developments in conservation from the mid-sixteenth century to the presentThis fascinating volume presents a wide-ranging overview of one of the lesser-known yet fundamental disciplines of art history: conservation. What happens when art ages? Bringing together some of the leading experts in the field, seventeen essays chart a journey through the theoretical, aesthetic, and technical debates surrounding the conservation of the work of the old masters. The problem of how to look after paintings as they grow old is a historically complex one. Should they be restored to their original glory, or should their appearance acknowledge the patina of time? What is to be done with damp and dirt, with rotten panels and yellowing varnishes? The development of conservation is entwined with the development of art history itself, as both deal with the interpretation of the past and its preservation for the future. Masterpieces like Jan and Hubert van Eycks Ghent Altarpiece or RembrandtsThe Night Watchhave been treated and mistreated many times in their long lives. By the nineteenth century, the growing knowledge of the techniques employed by the old masters had a profound influence on the treatments applied to their works. In the same period, the birth of national galleries as public institutions entrusted with the collective heritage led to the need to preserve large numbers of paintings and establish conservation departments rooted in scientific research. By the mid-twentieth century, the materials and techniques of painting were utterly transformed, demanding fresh approaches to their preservation. A discipline that sits at the crossroads of art, science, philosophy, and technology, modern conservation is the result of an ongoing collaboration between conservators, scientists, and art historians following rigorous ethical standards and training programs.