[4] Arum is a terp (artificial living mound) village which dates from the beginning of the Christian era and was located at the Marneslenk.

[5] In 1380, the Battle of Arum [nl] was fought near the village between the monks of the monasteries Ludingakerk (near Midlum) and Oldeklooster (near Hartwert), in which more than 130 men died.

[6] The Arumer Zwarte Hoop (Black Hope of Arum) was an army of peasants and mercenaries led by Grutte Pier (Pier Gerlofs Donia) who revenged the failed attack of Holland on Friesland, and as a pirate army plundered and raided cities in Holland from 1515 until 1518.

[10] Up to 1850, the village was concentrated around the intersection of the canal to Franeker and the road from Harlingen to Bolsward.

[5] The former inn De Gekroonde Leeuw is a square villa from 1876 which used to double as a tram stop.