Carmelites
Nuns in general are usually celibate- cloistered or not.
The Ursulines are Sisters not nuns. They were founded in the sixteenth century and were the very first Order that was founded that was not composed of cloistered nuns, instead they were founded for the education of young girls so the Sisters were not to be cloistered but to be out in the community. There was Episcopal opposition to a religious order of women that was not strictly cloistered, at that time.
All nuns started out as cloistered, that is the very definition of a nun, as opposed to a Sister. A Sister works out in the world, classically, teaching, nursing, etc. Nuns, such as Benedictines, Cistercians, Carthusians, were all cloistered, although many, not all, modern Benedictine nuns work out in the world like Sisters. (Cloistered is the term for an "enclosed Order". Classically, Carmelites, Visitation Sisters, Franciscans, Dominicans, and many others were cloistered as well, but they are not nuns.
I suppose false, as nuns may have been cloistered on occasion.
Conceptionists, or nuns blonging to the Order of the Immaculate Conception. They are Roman Catholic.
In the olden days, most nuns lived cloistered lives, safely secured from the world by tall convent walls and little to no interaction with the world beyond them.
Traditionally, and many contemporary convents of Carmelites wear a brown habit with a white wimple and black veil. They wear a cape over the entire thing when they are in choir, although there are some "modern" nuns who have modified their habits, or done away with them altogether. For the most part, the nuns with no habits are dying out, and the only orders that are surviving and growing are wearing habits.
.Catholic AnswerThere certainly are, there have been cloistered nuns in the Catholic Church since the 7th century when St. Benedict's twin sister, St. Scholastica started the Benedictine Order for Women. Please see the links below.
The habits look like School Sisters of Notre Dame.
Nuns' habits vary in color depending on their religious order and the symbolism associated with those colors. Common colors include black, worn by many orders like the Benedictines and Dominicans, symbolizing humility and simplicity. White habits, often seen in orders like the Poor Clares, represent purity and innocence. Other colors, such as brown for the Franciscans or gray for some other orders, can also denote specific spiritual themes or the history of the order.
The Roman Catholic Church, Anglicans, Lutherans, Orthodox Christians, Jains, Taoists, Hindus, and Buddhists are some of the churches that have nuns. They have chosen a cloistered lifestyle and are dedicated to their beliefs.
Monks and Friars live in a monastery. Nuns and cloistered women live in monasteries as well, not to be confused with convents.