The article is devoted to the comprehensive scientific restoration of architectural monuments and historical necropolis located on the territory of one of the most famous monasteries of the country – the Donskoy Stavropegial men's Monastery. The problem of the preservation of stone sculpture (marble, limestone, sandstone, granite) in an aggressive acid-alkali environment, exposed to the open air is raised. It sets out the main restoration principles and methods applied to specific monuments, as well as lists the types of work consistently undertaken by restorers to save architectural objects on the example of the Old (Small) Cathedral, the Church of Michael Archangel (the Tomb of the Golitsyns), towers, a monastery bath of the XVIII century, as well as works of monumental art, artistic tombstones of the old Don cemetery. It is especially noted that many tombstones made by outstanding masters have given the Don Necropolis the fame of the Open Air Museum. The special value of his collection is emphasized, it is possible to study architectural styles, to learn Russian history, to study complexes of monuments of cult, civil, fortification architecture, objects of monumental art and archaeological heritage, as well as to explore the latest types and methods of restoration work. The restorers have been working diligently for many years to restore the entire ensemble. The information presented in the article may be useful for restorers-practitioners and historians- ethnographers.