Nuccion

A nuccion (plural nuccia), is an extended family clan that also serves as a financial institution and a decentralized network of fortified, enclosed quarters. It is the central social group in Accan society. While most common in Acca itself, smaller branches of the great nuccia have been found in Ereithaler, Gallat, Satara, and even as far afield as Parthe. 
The nuccia are led by a nuccios, a male or female leader who typically succeeds in a semi-hereditary fashion (typically whichever member of the core family line has the most support). Beginning in the late 8th century RM, modern times, a governance councils called eccaletta have come to share decision making ability with the nuccios.
In their economic aspect, nuccia most resemble corporate conglomerates rather than just banks; while banking is one of their interests, varied branches of the great nuccia manage farming, mining, overseas trade, and even manufacturing. As such, specific economic crises can destroy elements within the nuccion, but rarely the nuccion itself.