The distinction between the Serbs of the more central region and the Croats of the north-west, was first drawn by the early Byzantine chroniclers, and was well established by the 12th century.
With these must be considered the Burgundian chroniclers Enguerrand de Monstrelet, whose chronicle (ed.
He devoted, however, to this period three folio volumes (Gesta Francorum seu rerum francicarum tomi tres, 1646-1658), which form a critical commentary of much value, and in many points new, on the chroniclers of the Merovingian age.
The security which he thereby gained gave him the opportunity to indulge his taste for costly buildings, parks and other luxuries, of which the chroniclers give accounts bordering on the fabulous.
While the chroniclers were recording the deeds of Frederick I.