[Repost for temporary lift of "no example-seeking questions" rule].
/u/veryshanetoday has recently answered Though it was not criminalized in most countries prior to the late 20th century, how socially acceptable would marital rape have been?
See also Is there any evidence to suggest that children who were married/taken as "lovers" in previous centuries suffered from similar psychological damage as contemporary victims of pedophilia and sexual abuse? answered by /u/sunagainstgold.