The gardens were acquired by Tiberius and maintained for several centuries by the Roman Emperors as a public amenity. The Emperor Nerva died of a fever in a villa in the gardens in AD 98, and they remained an imperial resort until they were sacked by the Goths in 410 (Procopius). In the early seventeenth century Ludovico Cardinal Ludovisi, nephew of Pope Gregory XV, purchased the site and constructed the Villa Ludovisi, in the course of which several important Roman sculptures were rediscovered. Much of the area occupied by the gardens was divided into building lots and filled following the break-up of Villa Ludovisi after 1894, as Rome expanded as the capital city of Italy after the unification of Italy.
Kim J. Hartswick, 2003. The Gardens of Sallust: A Changing Landscape (University of Texas Press) Reviewed by Eric M. Moormann, Bryn Mawr Classical Review, 20 The first monograph on the subject, covering topography and history, architecture and sculpture.