sentences:  Trpimir I managed to consolidate power over Dalmatia and much of the inland regions towards Pannonia, while instituting counties as a way of controlling his subordinates (an idea he picked up from the Franks).The first known written mention of the Croats, dates from 4 March 852, in statute by Trpimir.Trpimir is remembered as the initiator of the Trpimirović dynasty, that ruled in Croatia, with interruptions, from 845 until 1091.