John Lewyn was an English

master mason Freemasonry or Masonry refers to fraternal organisations that trace their origins to the local guilds of stonemasons that, from the end of the 13th century, regulated the qualifications of stonemasons and their interaction with authorities ...

of the late 14th century, responsible for major works at

Durham Cathedral The Cathedral Church of Christ, Blessed Mary the Virgin and St Cuthbert of Durham, commonly known as Durham Cathedral and home of the Shrine of St Cuthbert, is a cathedral in the city of Durham, County Durham, England. It is the seat of t ...

Durham Castle Durham Castle is a Norman castle in the city of Durham, England, which has been occupied since 1837 by University College, Durham after its previous role as the residence of the Bishops of Durham. Designated since 1986 as a cultural World Herit ...

Carlisle Castle Carlisle Castle is a medieval stone keep castle that stands within the English city of Carlisle near the ruins of Hadrian's Wall. First built during the reign of William II in 1093 and rebuilt in stone under Henry I in 1122, the castle is over ...

Bolton Castle Bolton Castle is a 14th-century castle located in Wensleydale, Yorkshire, England (). The nearby village of Castle Bolton takes its name from the castle. The castle is a Grade I listed building and a Scheduled Ancient Monument. The castle was da ...

and

Dunstanburgh Castle Dunstanburgh Castle is a 14th-century fortification on the coast of Northumberland in northern England, between the villages of Craster and Embleton. The castle was built by Earl Thomas of Lancaster between 1313 and 1322, taking advantage of t ...

. He was considered the pre-eminent master mason of that time in the north of England. Lewyn vaulted the Prior's Kitchen at Durham with star vaulting.

References

14th-century English architects Architects from County Durham {{England-architect-stub