Relationships in paintings over time:

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Throughout time, relationships have stayed the same. Artists have portrayed mother-child relationships the same as modern day and have shown interpersonal relationships.

Depending on where the painting was actually painted, you can see different cultures. In the "Raja Balwant Singh Revering Krishna and Radha" painting, you can see the Indian culture and customs.

Relationships don't typically change regardless of the time period being portrayed.