Question: What was the era of the castle located in the vicinity of Coalford, Scotland?
Context: Rowallan Castle is an ancient castle located near Kilmaurs, about 5 km north of Kilmarnock, East Ayrshire, Scotland.  The castle stands on the banks of the Carmel Water, which may at one time have run much closer to the low eminence upon which the original castle stood, justifying the old name Craig of Rowallan.  Elizabeth Mure (died before May 1355) was mistress and then wife of Robert, High Steward of Scotland, and Guardian of Scotland (1338–1341 and from October 1346), who later became King Robert II of Scotland.  She may have been born at Rowallan. Caisteal Maol (Gaelic: "Caisteal", 'Castle', "Maol", 'bare') is a ruined castle located near the harbour of the village of Kyleakin, Isle of Skye, Scotland.  It is also known as Castle Moil, Castle Maol, Dun Akyn, Dunakin Castle Dun Haakon and Castle Dunakin. Auchterhouse Castle is a c. 13th century castle located northwest of Dundee, Angus, Scotland.  The original castle was enclosed with walls, towers, and contained a keep.  The castle may have been in ownership of the Ramsay family, who were hereditary Sheriffs of Angus.  Sir William Wallace is alleged to have stayed at the castle and one its towers was named in his honour.  King Edward I of England spent the night of the 20 July 1303 at the castle.  The castle came into the possession of James Erskine, 7th Earl of Buchan who may have built the 17th century tower house. Crathes Castle (pronounced Crath-es) is a 16th-century castle near Banchory in the Aberdeenshire region of Scotland.  This harled castle was built by the Burnetts of Leys and was held in that family for almost 400 years.  The castle and grounds are owned and managed by the National Trust for Scotland and are open to the public. Coalford is a village in Aberdeenshire, Scotland situated slightly north of the River Dee.  A statue of Rob Roy MacGregor is located near to Coalford.  A number of noted historical structures lie in the vicinity of Coalford including Crathes Castle, Muchalls Castle, Maryculter House and the Lairhillock Inn.  Considerable prehistory occurs in the local region along the Deeside, as evinced by the ancient sites of Balbridie and Bucharn.  Coalford is situated near the ancient Roman Camp of Normandykes, which was accessed by a march northward from Raedykes via the Elsick Mounth trackway. Barcaldine Castle is a 17th-century tower house castle located at Barcaldine 9 miles north of Oban, Scotland.  The castle was built by Sir Duncan Campbell, of Glenorchy, between 1601 and 1609.  The castle fell into disrepair in the later 19th century, when Barcaldine House became the principal residence of the family.  It was restored between 1897-1911 and now operates as the Barcaldine Castle bed & breakfast hotel. The Mount Savage Castle located in Mount Savage, Maryland was built in 1840 as a plain stone house by the Union Mining Company.  Before the turn of the 20th century, the house was purchased by Andre Ramsey, an immigrant from Scotland who extensively modified the house and converted it into a replica of Craig Castle near his home in Scotland.  In 1984, the castle was renovated for use as a bed and breakfast facility. Kuwabara Castle (桑原城 , Kuwabara-jō ) , also known as Takatoya Castle and Suisho Castle, is a "yamashiro" (castle located on a mountain) situated in Suwa, Nagano Prefecture, Japan.  The castle was constructed sometime in the fifteenth century by the Kuwabara clan.  By the time it came under the control of the Suwa clan, it had become a satellite castle to Uehara Castle.  When forces of the Takeda clan arrived in the area in 1542, the lord of Uehara Castle, Suwa Yorishige, retreated to Kuwabara Castle, which was soon surrounded by Takeda soldiers.  The castle fell after a two-day siege.  Yorishige and his two brothers were taken to Kofu.  A month later, they were forced to commit seppuku. Ravenscraig Castle is a ruined castle located in Kirkcaldy which dates from around 1460.  The castle is an early example of artillery defence in Scotland.  Now managed by Historic Scotland and protected by Scheduled Ancient Monument this has been recognised as a category A listed building. Lews Castle (Scottish Gaelic: "Caisteal Leòdhais") is a Victorian era castle located west of the town of Stornoway, Isle of Lewis, Scotland.  It was built in the years 1844-51 as a country house for Sir James Matheson who had bought the whole island a few years previously with his fortune from the Chinese Opium trade.  It was designed by the Glasgow architect Charles Wilson.
Answer: 16th-century