According to legend, originated when the Giants built towns in the Mirna valley and from the remaining stones built Hum. Therefore, the hum of the smallest of all cities, and has called "the smallest city in the world." Hum along with Roc and Buzet, was one of the most important Croatian Glagolitic center, and therefore, in Hum can be found various Glagolitic monuments, such as Hum graphite at St. Jerome church and Hum Glagolitic inscriptions on the ground Polače.