Very little of pre-Reformation Dundee remains, the destruction suffered in the War of the Rough Wooing being almost total, with only scattered, roofless shells remaining. The area occupied by the medieval burgh of Dundee extends between East Port and West Port, which formerly held the gates to the walled city. The shoreline has been altered considerably since the early 19th century through development of the harbour area and land reclamation. Several areas on the periphery of the burgh saw industrial development with the building of textile mills from the end of the 18th century. Their placement was dictated by the need for a water supply for the modern steam powered machinery, and areas around the Lochee Burn (Lochee), Scouring Burn (Blackness) and Dens Burn (Dens Road area) saw particular concentrations of mills. The post war period saw expansion of industry to estates along the Kingsway.