"The City of the Sun" by Tommaso Campanella is a philosophical work written in 1602. Presented as a dialogue between a Knight Hospitaller and a sea captain, it describes an idealistic society built on a hill and protected by seven walls. In this community, goods, women, and children are held in common, work is shared equally, and citizens live according to strict rules guided by astrology and natural religion. The work explores radical ideas about collective living and social organization. (This is an automatically generated summary.)