That means very much the same thing as Einhard's ueterum regum actus et bella or the antiquorum actus regumque certamina sung by Bernlef (cf.
Citharisator homo jocosus in Gestis antiquorumvalde peritus," I conceive to give the precise idea of the ancient minstrel.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "antiquorum" in a variety of sentences. We hope that you will now be able to make sentences using this word.