 According to Duquesne, the Muisca used their 'perfect' number "gueta"; a century consisted of 20 holy years (20 times 37 months; 740) which equals almost 60 Gregorian years.The same scholar referred to a "common century" ("siglo vulgar") comprising 20 times 20 months.Pedro Simón, as described by Izquierdo Peña, found two different centuries; in the northern part of the Muisca Confederation (capital Hunza) and in the south, capital Bacatá.