Claim: In the construction of the Harlech Castle in 1282 in North Wales, the carpenters and stonemasons started in June and finished the inner walls by July.
Evidence: Harlech Castle (Welsh: Castell Harlech; Welsh pronunciation: [kastɛɬ ˈharlɛχ) in Harlech, Gwynedd, Wales, is a Grade I-listed medieval fortification built onto a rocky knoll close to the Irish Sea. It was built by Edward I during his invasion of Wales between 1282 and 1289 at the relatively modest cost of £8,190. Money to pay for the initial phase arrived in mid-May and carpenters and 35 stonemasons were dispatched in June and July to commence work. By the winter of 1283, the first 15 feet (4.6 m) of the inner walls had been constructed, allowing the castle to be defended in the event of an attack, and a small, planned town had been founded alongside the castle.