What does "fides matrimonii contracti" mean?

Question:

What does "fides matrimonii contracti" mean?

this was found on my great great great grandmothers wedding certificate

Best Answer - Chosen by Asker: From the Latin:

fides = proof, confirmation (nominative case of the noun fides)
matrimonii = of marriage (genitive case of the noun matrimonium)
contracti = of completion, of contract (genitive case of the adjective contractus, derived from the past participle of the verb contraho)

fides matrimonii contracti
proof of marriage contract = marriage certificate