The next major project was the rebuilding of the west front, or facade, in the Gothic style. The first stone was placed on May 25, 1277 by Bishop Conrad of Lichtenberg. The new plan was inspired in part by French cathedrals, particularly the Basilica of Saint-Urbain of Troyes. The design called for a west front taller and wider than the nave behind it. By the use of buttresses and a double wall, the outer wall decorative with wide spaces, and the inner wall bearing the weight and having large windows, the interior of the cathedral could have more light. At the same time, the planned two spires on either side of the facade would reach an extraordinary height of 122 meters. Erwin von Steinbach's son Johannes von Steinbach served as "magister operis", or "Werkmeister" (chief architect) from (at least) 1332 until his death in 1341. From 1341 until 1372 (or according to other sources: 1339–1371), the post of chief architect was held by a Master Gerlach (not to be confused with Erwin's other son, Gerlach von Steinbach, architect of the Niederhaslach Church), who has been identified as Erwin's grandson Johannes Gerlach von Steinbach. He completed the installation of the rose window, and above it twelve statues of the apostles. In 1372 the work was taken over a master Conrad, also known as Kuntze, about whom little is known, until 1382. He was followed by a Michael von Freiburg (also known as Michael von Gmünd, or Michael Parler, from the Parler family of architects), recorded as "magister operis" in 1383–1387, who was then succeeded by Claus von Lohre (1388−1399). The three men completed the bell tower over the central part of the façade, in a design that moved away from Gerlach von Steinbach's initial idea of a central tower and whose precise authorship is unknown.