Israël David Kiek was an early portrait photographer who gave rise to the Dutch expression kiekje, meaning snapshot. Kiek, who lived and worked in the Netherlands in the 19th century, produced cartes de visite, but was best known as a photographer of students at the University of Leiden. It was common practice among Leiden's students to have a group portrait taken by Kiek at his workshop on the Rijnsburgersingel. Groups of students would regularly appear on his doorstep in the early morning, after a long night of drinking, banging on the door to wake him and get their picture taken. The students' behaviour became so bad that Kiek eventually had a fence and raisable bridge installed to keep them out.