In the beginning of the counting of the years?
When I'm talking about historical events, around the years 1-130 ac, I need an expression which means "during the beginning of the counting of the years" or "the first 130 years of the beginning of the counting of the years".
Of course I can say "around the years 1-130 ac" or "during the beginning of the first millennium", but I need an alternative with a more wide context.