After the 1356 Basel earthquake, the damaged choir of Basel's cathedral was rebuilt in a Gothic Rayonnant style. The towers and west façade were rebuilt in Gothic style during the 15th century. In 1421 construction began on the Bern Minster, one of the most important late-Gothic buildings in Switzerland. Its size and ornate design were a testament to the growing wealth and power of the new city-state. Throughout Zurich, Graubünden and Valais a number of new Gothic parish churches sprung up throughout the 15th and 16th centuries. However, in Inner Switzerland, the only new construction was the parish church of St. Oswald in Zug.