Final answer:
In ancient Rome, public works of art placed outside by private citizens belonged to the public and served as political propaganda for emperors.
Explanation:
In ancient Rome, a work of art placed outside a building by a private citizen that could be seen by the public was generally considered as belonging to the public. These public works of art, whether sculptures or monuments, served as political propaganda and showcased the achievements of the emperor to all Romans. While private artworks were limited in audience and often displayed in more exclusive settings, public art aimed to reach a broader audience to convey specific messages.
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