Later, Pachomius felt called to build a monastery on the banks of the Nile at Tabennisi; so about 318 Palemon helped him build a cell there and even remained with him for a while. In a short time some one hundred monks joined him and Pachomius organized them on principles of community living. So prevalent did the desire to emulate the life of Pachomius and his monks become, that the holy man was obliged to establish ten other monasteries for men and two nunneries for women. Before his death in 346, there were seven thousand monks in his houses, and his Order lasted in the East until the 11th century. St. Pachomius was the first monk to organize hermits into groups and write down a Rule for them. Both St. Basil and St. Benedict drew from his Rule in setting forth their own more famous ones. Hence, though St. Anthony is usually regarded as the founder of Christian monasticism, it was really St. Pachomius who began monasticism as we know it today.
above text taken from ucatholic.com