Derry, officially known as Londonderry, is the second largest city in Northern Ireland. It lies in the north western tip of the region, on the west bank of the River Foyle. The name ‘Derry’ is an anglicisation of the Old Irish name ‘Daire’, meaning ‘Oak grove’. The city was granted a royal charter in 1613 and gained the ‘London’ prefix. It currently has a population of 90,736. The inner city is surrounded by diamond-shaped defensive walls, measuring 1.6 kilometres in total, making them the city’s defining feature. The city hosts many other historical buildings, including the old Guildhall and the St. Columb’s Cathedral.