The season of Lent has always been a time when the Church prepared new converts to become full members by instructing them in matters of the faith and preparing them for baptism. Here is a description from how this was done in the 4th century in Jerusalem.

I must also describe how those who are baptized at Easter are instructed. Those who give their names do so the day before Lent, and the priest notes down all their names; and this is before those eight weeks during which, as I have said, Lent is observed here. When the priest has noted down everyone’s name, then on the following day, the first day of Lent, on which the eight weeks begin, a throne is set up for the bishop in the center of the major church, the Martyrium. The priests sit on stools on both sides, and all the clergy stand around. One by one the candidates are led forward, in such a Way that the men come with their godfathers and the women with their godmothers.

Then the bishop questions individually the neighbors of the one who has come up, inquiring; “Does this person lead a good life? Obey parents? Is this person a drunkard or a liar?” And the bishop seeks out in the candidate other vices which are more serious. If the person proves to be guiltless in all these matters concerning which the bishop has questioned the witnesses who are present, the bishop notes down the candidate’s name. If, however, the candidate is accused of anything, the bishop orders the person to go out and says: “Let such a one amend their life, and when this is done, then approach the baptismal font.” He makes the same inquiry of both men and women.  If, however, some are strangers, such people cannot easily receive baptism, unless they have witnesses who know them.

Ladies, my sisters, I must describe this, lest you think that it is done without explanation. It is the custom here, throughout the forty days on which there is fasting, for those who are preparing for baptism to be exorcised by the clergy early in the morning, as soon as the dismissal from the morning service has been given at the Anastasis. Immediately a throne is placed for the bishop in the major church, the Martyrium. All those who are to be baptized, both men and women, sit closely around the bishop, while the godmothers and godfathers stand there; and indeed all of the people who wish to listen may enter and sit down, provided they are of the faithful. A catechumen, however, may not enter at the time when the bishop is teaching them the law. The bishop does so in this way: beginning with Genesis and going through the whole of Scripture during these forty days, expounding first its literal meaning and then explaining the spiritual meaning.  In the course of these days everything is taught not only about the Resurrection but concerning the body of faith. This is called catechetics.

When five weeks or instruction have been completed, they then receive the Creed The bishop explains the meaning of each of the phrases of the Creed in the same way as Holy Scripture was explained, expounding first the literal and then the spiritual sense. ln this fashion the Creed is taught.

And thus it is that in these places all the faithful are able to follow the Scriptures when they are read in the churches, because all are taught through these forty days, that is, from the first to the third hours, for during the three hours instruction is given. God knows, ladies, my sisters,  that the voices of the faithful who have come to catechetics to hear instruction on those things being said or explained by the bishop are louder than when the bishop sits down in church to preach about each of those matters which are explained in this fashion. The dismissal from catechetics is given at the third hour, and immediately, singing hymns, they lead the bishop to the Anastasis [the cross], and the office of the third hour takes place. And thus they are taught for three hours a day for seven weeks. During the eighth week, the one which is called the Great Week, there remains no more time for them to be taught, because what has been mentioned above must be carried out.

Now when seven weeks have gone by and there remains only Holy Week, which is here called the Great Week, then the bishop comes in the morning to the major church, the Martyrium. To the rear, at the apse behind the altar, a throne is placed for the bishop, and one by one they come forth, the men with their godfathers, the women with their godmothers. And each one recites the Creed back to the bishop. After the Creed has been recited back to the bishop, the bishop delivers a homily to them all, and says: “During these seven weeks you have been instructed in the whole law of the Scriptures, and you have heard about the faith. You have also heard of the resurrection of the flesh. But as for the whole explanation of the Creed, you have heard only that which you are able to know while you are still catechumens. Because you are still catechumens, you are not able to the those things which belong to a higher mystery, that of baptism. But that you may not think that anything would be done without explanation, once you have been baptized in the name of God, you will hear of them during the eight days of Easter in the Anastasis following the dismissal from church. Because you are still catechumens, the most secret of the divine mysteries cannot be told to you.”

—Egeria, Abbess (late 4th century), The Pilgrimage of Egeria, 45-46

[On Good Friday] following the dismissal from the Cross, which occurs before sunrise, everyone now stirred up goes immediately to Sion to pray at the pillar where the Lord was whipped. Returning from there then, all rest for a short time in their own houses, and soon all are ready. A throne is set up for the bishop on Golgotha behind the Cross, which now stands there. The bishop sits on the throne, a table covered with a linen cloth is set before the bishop, and the deacons stand around the table. The gilded silver casket containing the sacred wood of the cross is brought and opened. Both the wood of the cross and the inscription are taken out and placed on the table. As soon as they have been placed on the table, the bishop, remaining seated, grips the ends of the sacred wood, while the deacons, who are standing about, keep watch over it. There is a reason why it is guarded in this manner. It is the practice here for all the people to come forth one by one, the faithful as well as the catechumens, to bow down before the table, kiss the holy wood, and then move on. It is said that someone (I do not know when) took a bite and stole a piece of the holy cross. Therefore, it is now guarded by the deacons standing around, lest there be anyone who would dare come and do that again.

All the people pass through one by one; all of them bow down, touching the cross and the inscription, first with their foreheads, then with their eyes; and, after kissing the cross, they move on. No one, however, puts out a hand to touch the cross. As soon as they have kissed the cross and passed on through, a deacon, who is standing, holds out the ring of Solomon and the phial with which the kings were anointed. They kiss the phial and venerate the ring from more or less the second hour [8am]; and thus until the sixth hour [noon] all the people pass through, entering through one door, exiting through another. All this occurs in the place where the day before, on Thursday, the sacrifice was offered.

When the sixth hour is at hand, everyone goes before the Cross, regardless of whether it is raining or whether it is hot. This place has no roof, for it is a sort of very large and beautiful courtyard lying between the Cross and the Anastasis [the Lord’s tomb]. The people are so clustered together there that it is impossible for anything to be opened. A chair is placed for the bishop before the Cross, and from the sixth to the ninth hours [noon-3pm] nothing else is done except the reading of passages from Scripture.

First, whichever Psalms speak of the Passion are read. Next, there are readings from the apostles, either from the Epistles of the apostles or the Acts, wherever they speak of the Passion of the Lord. Next, the texts of the Passion from the Gospels are read. Then there are readings from the prophets, where they said that the Lord would suffer; and then they read from the Gospels, where He foretells the Passion. And so, from the sixth to the ninth hour, passages from Scripture are continuously read and hymns are sung, to show the people that whatever the prophets had said would come to pass concerning the Passion of the Lord can be shown, both through the Gospels and the writings of the apostles, to have taken place. And so, during those three hours, all the people are taught that nothing happened which was not first prophesied, and that nothing was prophesied which was not completely fulfilled. Prayers are continually interspersed, and the prayers themselves are proper to the day. At each reading and at every prayer, it is astonishing how much emotion and groaning there is from all the people. There is no one, young or old, who on this day does not sob more than can be imagined for the whole three hours, because the Lord suffered all this for us. After this, when the ninth hour is at hand, the passage is read from the Gospel according to Saint John where Christ gave up His spirit. After this reading, a prayer is said and the dismissal is given.

As soon as the dismissal has been given from before the Cross, everyone gathers together in the major church, the Martyrium, and there everything which they have been doing regularly throughout this week from the ninth hour when they came together at the Martyrium, until evening, is then done. After the dismissal from the Martyrium, everyone comes to the Anastasis, and, after they have arrived there, the passage from the Gospel is read where Joseph seeks from Pilate the body of the Lord and places it in a new tomb. After this reading a prayer is said, the catechumens are blessed, and the faithful as well; then the dismissal is given.

On this day no one raises a voice to say the vigil will be continued at the Anastasis, because it is known that the people are tired. However, it is the custom that the vigil be held there. And so, those among the people who wish, or rather those who are able, to keep the vigil, do so until dawn; whereas those who are not able to do so, do not keep watch there. But those of the clergy who are either strong enough or young enough, keep watch there, and hymns and antiphons are sung there all through the night until morning. The greater part of the people keep watch, some from evening on, others from midnight, all doing what they can.

—Egeria, Abbess and Pilgrim, Pilgrimage 17