As a result of the destruction suffered during the Rough Wooing, little of the mediaeval city (aside from St Mary's Tower) remains and the earliest surviving domestic structures date from the Early Modern Era. A notable example is the Wishart Arch (or East Port) in Cowgate. It is the last surviving portion of the city walls. Dating from prior to 1548, it owes its continued existence to its association with the Protestant martyr George Wishart, who is said to have preached to plague victims from the East Port in 1544.</ref> Another is the building complex on the High Street known as Gardyne's Land, parts of which date from around 1560. The Howff burial ground in the northern part of the City Centre also dates from this time; it was given to the city by Mary Queen of Scots in 1564, having previously served as the grounds of a Franciscan abbey.