1240s in architecture

Buildings

 * 1240 – Construction begins of the Castel del Monte in Apulia, Italy, for Frederick II, Holy Roman Emperor; used by Frederick primarily as a hunting lodge.
 * 1242 – Heddal Stave Church in Norway consecrated, built in the first half of the 13th century.
 * 1242 – Rebuilding of Peyrepertuse Castle in France to its current form begun.
 * c.1245 – Rebuilding of Westminster Abbey begun.
 * 1246 – Lakshmi Narasimha Temple, Nuggehalli built in the Hoysala Empire.
 * 1247
 * Basilica of St. Cunibert, Cologne, consecrated.
 * Inauguration of St. Mary's Church, Sigtuna, Sweden.
 * Start of reconstruction of Bassac Abbey.
 * Approximate start of construction of original Pagoda of Monk Wansong in Beijing.
 * 1248
 * April 26 – Consecration of Sainte Chapelle, Paris.
 * August 15 – The foundation stone of Cologne Cathedral in Cologne is laid by Archbishop Konrad von Hochstaden.
 * 1249 – Sadasiva Temple, Nuggehalli built in the Hoysala Empire.

Deaths

 * 1245 – c. June: Elias of Dereham, English canon and building designer