Berwickshire (Scottish Gaelic: Siorrachd Bhearaig) is a historic county, registration county and lieutenancy area in southeastern Scotland, on the English border. It takes its name from Berwick-upon-Tweed, which was part of Scotland at the time of the county's formation, but became part of England in 1482 after several centuries of swapping back and forth between the two kingdoms. From 1596 to 1890 the county town was Greenlaw. However, this was changed to Duns by the Local Government (Scotland) Act 1889, the act which established the system of county councils in Scotland.