On a Thursday in June 1433 nine leaders of the Peruzzi family, one of Florence's biggest and most celebrated lineages, met in the house of Ridolfo di Bonifazio Peruzzi to discuss, as they had precisely four years earlier, how to prevent or if necessary how to deal with various offences—slanders, robberies, assaults or even murders—that might be committed by men of the Peruzzi against others. We know about these intriguing clan meetings, a response to the factional manoeuvring of the years 1426-34, from an unpublished document, formally recording the family's decision on 25 June 1433 to elect three of their number with “pieno e libero mandato da tutti gl'altri a potere procedere contro a qualunche persona facessi per l'innanzi alcuna villania, danno o dispiacere ad alcuna persona,” which survives in two seventeenth-century copies in the Archivio Peruzzi de' Medici, a private collection deposited in the Florentine State Archives in 1935.