Rubuta ci gaba don wannan sakin layi - A karni na 14 Haarlem babban birni ne. Ita ce birni na biyu mafi girma a cikin tarihin Holland bayan Dordrecht kuma kafin Delft, Leiden, Amsterdam, Gouda da Rotterdam. A cikin 1429 birni ya sami haƙƙin karɓar haraji, gami da jiragen ruwa da ke wucewa birni a kan kogin Spaarne. A ƙarshen tsakiyar zamanai Haarlem birni ne mai ci gaba tare da babban masana'antar masana'anta, tashar jiragen ruwa da masana'antar giya. Kusan 1428 sojojin Jacqueline, Countess na Hainaut sun kewaye birnin. Haarlem ta goyi bayan Cods a cikin Hook da Cod wars
, kuma ta haka ne a kan Jacoba na Bavaria. Dukan katako na Haarlemmerhout ya ƙone ta abokan gaba.