This is the household of my patrilineal ancestors in the 1863 Serbian census, in a village in rural western Serbia:

https://imgur.com/a/Z5g6r9v

This type of extended-family household called "zadruga" existed for a long time in the Balkans and gradually died out starting from the late 19th century, the last ones being around until WW2.

Generally formed of one extended family or a clan of related families, the "zadruga" held its property, herds and money in common, with usually the oldest (patriarch) member making decisions for the family, though at times he would delegate this right at an old age to one of his younger brothers, or sons, or nephews.

Because the zadruga was based on a patrilocal system, when a girl married, she left her parents' zadruga and joined that of her husband. Within the zadruga, all of the family members worked to ensure that the needs of every other member were met. Although they are long gone, the zadruga system continues to color life in the Balkans; the typically intense concern for (extended) family found among Serbs and certain other South Slavs to this day is partly due to centuries of living in the zadruga system.

My family's zadruga in this 1863 census pic consists of the head of the household, his wife, their four sons, daughters-in-law and their grandchildren, as well as his four nephews (his older brother's four sons), and their wives and children. Of course, not all of the sons and nephews were old enough to be married at this time. The family grew even further to almost 50 people, when in 1870, after the "patriarch" died, they finally split into two smaller zadruga's, containing four respective brothers each, and they went on to exist as two neighbouring households until the 1890s, when they broke up again (as zadrugas are destined to do).

What is a particularly numerous household your ancestors had?