The decoration of the churches, like that of the temples, was mostly done by private contributions and gifts of works of art. The laying out of the pavement, for instance, or the painting of the walls was apportioned to voluntary subscribers, each of whom was entitled to inscribe his name on his section of the work. The pavement of the lower basilica of Parenzo, in Dalmatia, is divided into mosaic panels of various sizes, representing vases, wreaths, fish, and animals; and to each panel is appended the name of the contributor:-- "Lupicinus and Pascasia made one hundred [square] feet. "Clamosus and Successa, one hundred feet. "Felicissimus and his relatives, one hundred feet. "Fausta, the patrician, and her relatives, sixty feet. "Claudia, devout woman, and her niece Honoria, made one hundred and ten feet, in fulfilment of a vow."[21] Theseus killing the Minotaur in the labyrinth of Crete, and labyrinths in general, were favorite subjects for church pavements, especially among the Gauls. The custom is very ancient, a labyrinth having been represented in the church of S. Vitale at Ravenna as early as the sixth century. Those of the cathedral at Lucca, of S. Michele Maggiore at Pavia, of S. Savino at Piacenza, of S. Maria in Trastevere at Rome (destroyed in the restoration of 1867), are of a later date. The image of Theseus is accompanied by a legend in the "leonine" rhythm:-- _Theseus intravit, monstrumque biforme necavit._ The symbolism of the subject is explained thus: The labyrinth, so easy of access, but from which no one can escape, is symbolical of human life. At the time of the Crusades, church labyrinths began to be used for a practical purpose. The faithful were wont to go over the meandering paths on their knees, murmuring prayers in memory of the passion of the Lord. Under the influence of this practice the classic and Carolingian name--labyrinth--was forgotten; and the new one of _rues de Jerusalem_, or _leagues_, adopted. The _rues de Jerusalem_ in the cathedral at Chartres, designed in blue marble, were 666 feet long; and it took an hour to finish the pilgrimage. Later the labyrinths lost their religious meaning, and became a pastime for idlers and children. The one in the church at Saint-Omer has been destroyed, because the celebration of the office was often disturbed by irreverent visitors trying the sport.[22]