The bird's-eye view map by Pieter Bast (ca. 1550-1605) of Leiden from 1600 shows the Latin school that Rembrandt attended as a boy, on the corner of Schoolsteeg and Lokhorststraat. The school was founded before 1324 and moved to the Lokhorststraat in 1431. In 1599 the school was demolished and replaced by the building that still stands today, designed by the masons Jacob Dircxz. den Dubbelden (died 1617) and Claes Cornelisz. van Es (born circa 1530).
In Rembrandt's time, the Latin school had six classes, and boys - mostly from the upper and middle classes - went through these from the age of seven to fourteen. The curriculum was not yet established at the beginning of the seventeenth century, but consisted largely of learning Latin grammar. This way, the pupils were prepared for University and ultimately a career in science or for a religious office. Pupils were assured of a place at the University and were sometimes already enrolled while still attending school.
Rembrandt must have been about seven years old when his parents enrolled him at the Latin school. So he would have attended school there from 1613 to 1620. However, Orlers writes that Rembrandt's focus was mainly on drawing and painting and that his parents took him out of school to apprentice him to Jacob Isaacsz. van Swanenburg (1571-1638).
Pieter Bast, Lugdunum Batavorum. Leyden in Hollant (S.l., 1600), COLLBN 009-11-025.