Actually, everyone here is only partially right.
The stalls (proper name) facing each other, are found in Cathedrals and churches or chapels attached to religious monasteries, friaries, priories or to canons. It is true that they were used to pray the LOTH. However, with the founding of the Franciscans, they also became the place where they celebrated the mass. Prior to the Franciscans, the stalls were only used for the Liturgy of the Hours. Religious houses had a different space for the mass. In Cathedrals, where they had canons, mostly Augustinians, the canons would not sit at the stalls during the mass. The Franciscans were the first to sit at the stalls during the mass, for one everry siimple reason. They were too poor to build large churches and chapels and St. Francis prohibited the building of monasteries. Therefore, the friars lived in convents and still do so. One of the big differences between a convent and a monastery is that a convent has only one worship space. There are other differences too, but that’s the major one, hence the term “conventual mass.”
A church filled with pews was not a common thing in the Latin Church until the Protestants introduced it to us. There were usually a few pews up front, about 1/4 to 1/3 of the way toward the back. The wealthy purchased them or paid rent for them and the poor stood behind. To this day, you can enter many of the older European churches and find large open spaces behind the pews. These were for the poor and also used by the military who came inside on their horses. That’s why the lintels on the doors were so high.
The box pew is not a Protestant contraption. It is a German idea,used by Catholics and Protestants. The reason for it was to keep people warm, because parts of Germany are very cold. Many of the old churches had individual stoves at the pew where hot bricks were placed to keep people’s feet warm.
After the Protestant Reformation, the idea of pews from front to back became very popular. The Evangelical style Protestants made it very popular. Because their service is mostly preaching, you sit for a very long period of time, sometimes several hours. The pews were introduced. The Catholics copied the idea, especially after the American and French Revolutions where the idea equality came in and the notion of an ariistocracy went out. However, if you attend mass at one of the older churches in South America, which are older than the Catholic churches in the USA, the Hispanic and Portuguese did not adopt this idea until much later. Therefore, their older churches still have few pews and large open spaces the last 2/3 of the church.
If you attend mass at some older convents of men, you still do not face the altar from the east or west. You face it from the north and south. You’re seeing the mass from the side, because they have stalls, not pews. Some of the newer monastic houses have combined the two spaces into one, in order to make construction less expensive. Remember, a monastic house is for monks and nuns, a convent is for friars and sisters.
In newer monastic houses there is no choir and separate chapel or church, but only one church or chapel. In that case, the choir is often further back than it was in the old days, creating a very large open space around the altar so that the religious stand during the whole mass in that space. Therefore, there are no railings, because you have to accomodate the religious community around the altar. Another thing that is being done in some monastic houses is to keep the stalls close to the front and celebrate mass in the same space where the LOTH is celebrated. That’s a Post Vatican II model for monks and canons. Friars always did it that way. My belief is that as time passes, we borrow from each other, not only across religious tradition inside the Catholic Church, but even from outside the Catholic Church. We do what makes sense and what is econimically possible.
The older monastic houses still have two spaces, a choir for the LOTH and a chapel or large church for the mass. The newer ones can’t afford that. Today, construction is very expensive. With the economic crisis, that type of construction in on pause and the one space for all things is more common.
Fraternally,
Br. JR, OSF