Unlikely to be any 'certificate' from that early era. I have only found such things in church records and in newspapers. Both are spotty. In a message dated 9/22/03 11:05:09 PM Eastern Daylight Time, [email protected] writes: << If my gggreat-grandfather Alfred A. ESTEY was married twice in Rome, first time on 11/10/1825 to a Mary SEARS and the second about 1843 to a Sarah ?, where would I begin to look for a marriage certificate? >>