It's Rembrandt's "The Night Watch", yes. Initially, it was considerably bigger, but was cut down when removed from the room in which it was first hung. It's a horrible thing to do because the proportions change, but Rembrandt did this himself with his huge "Claudius Civilis" when it was refused.
Rembrandt was really the first modern painter and we are heavily indebted to him. He used surprisingly abstract techniques. Lucian Freud has continued in his tradition.
Mats