What's the difference between adytum and sacrarium?

Adytum

Definition:

• (n.) The innermost sanctuary or shrine in ancient temples, whence oracles were given. Hence: A private chamber; a sanctum.

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Sacrarium

Definition:

• (n.) A sort of family chapel in the houses of the Romans, devoted to a special divinity.
• (n.) The adytum of a temple.
• (n.) In a Christian church, the sanctuary.

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