In the year 1027 bishop Wernher set out for Constantinople, and never returned to his native land. From that time we have but imperfect and uncertain accounts touching the progress of the building. All we know is, that in 1028 they had built up to the roof. It seems likely from that account that this monument, built in the byzantine style, at once so elegant and so simple, was soon after completed by the erection of a tower, and that it remained in the same state till, owing to sundry circumstances and, perhaps, to bad construction, it began to need important repair. It is impossible to determine the time when repairing the church took place; however, this happened probably not before the middle of the thirteenth century and in the then new style, since called the Gothic order. This opinion is confirmed by the ancient seal of our city, which likely enough and according to the custom of those times, represents the front of the Cathedral.
That it had a tower in 1130 is a certain fact; for Kœnigscoven speaks of its destruction by fire in the course of that year; successive fires, in 1140, 1150, 1176 also materially injured the beautiful edifice; besides, the continual wars and tumultuous commotions of the time prevented the bishops from undertaking essential repairs. It appears that these causes, by degrees, brought on the complete ruin of bishop Wernher's constructions; for unquestionably the part included between the nave and the two towers dates but from the thirteenth century, and cannot have been begun before the middle of it. What remained of the old church was pulled down at that time and a new and more spacious edifice was erected, built in the style then spreading over all Europe. Considering the immense size of this monument, it is easy to imagine that the work went on but slowly, and an old chronicle mentions that on the 7th September 1275 they finished the middle part of the superior arch-roofs, with the exception of the towers in front. By whom these labours were directed is altogether unknown.
It was bishop Conrad of Lichtenberg who undertook to rebuild the parts that were still in a state of ruin and thus at last to accomplish this great work of the Cathedral[1].
[1] «... Ipsa ecclesia in meliorum statuum reedificetur ...» (See a charter of bishop Conrad of Lichtenberg, published by M. L. Space 1841, p. 6).
In order to execute this design, he published indulgences all over the country; and after collecting large sums of money in the town, he applied to the ecclesiastics of his diocese, asking their own gifts and offerings as well as those of the faithful under their direction; in a synod held in the diocese, the clergy agreed to give up, during four years, a fourth part of their revenues. Conrad entrusted the direction of this work to Master Erwin of Steinbach, who, according to some old documents, was a native of Mayence. This great architect began by rebuilding the nave, the arch-roofs of which were completed in 1275. Then he commenced the façade of the church and its towers from a plan so bold and sublime that the conception of it places Erwin for ever at the head of the architects of the middle age[1]. In 1276 they laid the foundation of the northern tower; to consecrate the spot, the bishop walked solemnly round it, then took a trowel in his hand and thrust it into the ground, as a sign for beginning the work. They relate that a quarrel having occured between two workmen who both wished to work with the trowel the bishop had held in his hand, one of them was killed. This murder was considered as a very bad omen; Conrad ordered their labour to be suspended for nine days; they were only resumed after he had consecrated the place anew. The following year, on saint Urban's day (25th May), Conrad himself laid the first stone of the tower. In the midst of his warfares, this bishop always entertained much affection for his Cathedral, as he beheld the gradual rising of this glorious work, as an old inscription terms it[2]; in his heartfelt joy he used to compare it to the flowers of May that bloom in the sun[3]. To the very end of his life Conrad of Lichtenberg neglected nothing to urge on the progress of his work of predilection; after his death, in 1299, he received in it a sepulchre worthy of him; his statue is still to be seen in saint John's chapel. Yet, during the life of Conrad, the Cathedral was shaken by several earthquakes in 1279, 1289, 1291; that of 1289 was so violent that the columns in the interior of the building threatened for a moment to fall down. But a very favourable circumstance happened in 1292, which was the surrender of the Œuvre-Notre-Dame to the magistrate of the city, who was henceforth charged with the management of the revenues allotted to the keeping in repair of the Church and consequently also to the completion of it. A few years after, in 1298, a new misfortune happened to the Cathedral. A fire, caused by the imprudence of a cavalier of Albert I, during the sojourn of that prince at Strasburg, consumed all the timberwork and threatened even the pillars and walls. However the damage was promptly repaired. In 1302 a bloody conflict between two citizens of the town, which took place in the very chancel of the church, required again a new consecration of it.
[1] They still preserve in the records of the convent of the Œuvre Notre-Dame several old drawings on parchment of the façade and towers; these curious designs belong to different epochs; according to the opinion of the connaisseurs, the oldest would most likely be that of Erwin himself.
[2] Anno Domini MCCLXXVII in die beati Urbani hoc gloriosum opus inchoavit magister Erwinus de Steinbach. This inscription was formerly placed in the vault of the northern portal.
[3] In a letter of indulgence.
After the death of bishop Conrad of Lichtenberg, who in the year 1299 was killed in a battle near Friburg, his brother and successor, Frederic, showed no less ardour for the continuation of this building; in 1303 he invited the curates throughout Alsacia to exhort those of their faithful parishioners who had horses and carts, to convey stones for the edifice; in 1308 the magistrate of Strasburg, no doubt at the request of bishop John, promised freepasses to all those who would bring stones or wood, and he secured wine and wheat for the workmen.
Erwin superintended the works until 1318, when he died on the 14th of January. All the children of this grand master were artists worthy of him: Sabina, his daughter, carved several statues for the Cathedral; one of his sons, who died in 1330, built the fine church of Haslach; his other son, John, succeeded him in directing the works of the Cathedral, and he died in 1339. In 1331 bishop Berthold of Bucheck built the chapel of saint Catherine, which also contains his tomb. The disturbances and calamities that desolated Strasburg during a great part of the fourteenth century, the revolution of 1332 that altered the form of the government of the town, the ravage caused by the black plague in 1349 with the insurrections accompanying it, the contest of bishop Berthold with his chapter and with the emperor, all this retarded of course the progress of the construction of the Cathedral. Nevertheless they terminated in 1365 the northern tower; Kœnigshoven calls it the new tower, perhaps, because they purposed erecting a pyramid on it, which was quite an innovation in the architecture of that time. The southern tower, which the chronicler calls the ancient one, because it was not intended to be raised higher, was finished at the same time. The name of the artist who made the plan of the pyramid and spire of the northern tower is still unknown; nor is it known who built the steeple which formerly rose above the grande rosace, or rose.