1280s in architecture

Buildings

 * 1280
 * The Piazza del Campo at Siena, Italy is begun (completed in 1350).
 * Durham Cathedral (in Durham, England) is completed (begun in 1093).
 * The second Doorwerth Castle, rebuilt of stone, on the Rhine near Arnhem, is again besieged, and this time the bailey is burned down.
 * At the site of present-day Sheffield Cathedral in England, a second parish church is completed, but is mostly demolished and rebuilt about 1430 on a cruciform floor plan.
 * Spire of St Wulfram's Church, Grantham, England, is begun.
 * Cressing Temple Wheat Barn in eastern England erected by about this date.
 * 1281 – The Basilica de Sant Francesc is built in Palma, Majorca, on a site where the Moors made soap.
 * 1282
 * In Naples, Italy, original construction of Castel Nuovo (Italian: "New Castle") is completed (begun in 1279); it has been expanded or renovated several times since.
 * Albi Cathedral in Languedoc is begun.
 * 1283 – Construction of Caernarfon, Conwy and Harlech Castles in Gwynedd, North Wales, is begun by King Edward I of England.
 * 1284 – Construction of Beauvais Cathedral is interrupted by a partial collapse of the choir.
 * 1285 – Regensburg Cathedral is redesigned in Gothic style.
 * 1289
 * Construction of Conwy Castle, ordered by King Edward I of England, is completed in North Wales.
 * Construction of the Belaya Vezha tower in Belarus is completed.
 * Dedication of Santa Maria di Collemaggio on the edge of L'Aquila.
 * Pope Nicholas IV formally constitutes the University of Montpellier in France by papal bull, combining various existing schools under the mantle of a single university.

Births

 * c. 1285 – Agostino da Siena, Italian architect and sculptor (died c. 1347)