After this, covered carriages seem more and more to have become appendages of Roman pomp and magnificence; but the manner of thinking which prevailed under the feudal system banished the use of them for some time. As it was of the greatest importance to the feudal lords that their vassals should be always able to serve them on horseback, they could not think of indulging them with elegant carriages. They foresaw that by such luxury the nobility would give over riding on horseback, and become much more indolent and less fit for military service. Masters and servants, husbands and wives, clergy and laity, all rode upon horses or mules, and sometimes women and monks upon she-asses, which they found more convenient. The minister rode to court, and the horse, without any conductor, returned alone to his stable, till a servant carried him back to court to fetch his master. In this manner the magistrates of the imperial cities rode to council in the beginning of the sixteenth century; so that in the year 1502 steps to assist in mounting were erected by the Roman gate at Frankfort[154]. The members of the council who, at the diet and on other occasions, were employed as ambassadors, were on this account called _Rittmeister_; and even at present the expression _riding servant_ is preserved in some of the imperial cities. The public entry of great lords into any place, or their departure from it, was never in a carriage, but on horseback; and in all the works which speak of the papal ceremonies there is no mention of a state coach or body coachmen, but of state horses or state mules. It was necessary that a horse for his holiness should be of a gray colour; not mettlesome however, but a quiet, tractable nag; that a stool with three steps should be brought to assist him to mount, and the emperor and kings, if present, were obliged to hold his stirrup and to lead the horse[155], &c. Bishops made their public entrance on horses or asses richly decorated[156]. At the coronation of the emperor, the electors and principal officers of the empire were ordered to make their entrance on horses, and to perform their service on horseback[157]. Formerly it was requisite that those who received an investiture should make their appearance on horseback: the vassal was obliged to ride with two attendants to his lord’s court, where, having dismounted from his horse, he received his fief.