Fanum in colle Quirinali Romulo deo, qui idem Quirinus vocatur, dicatum est.
I am not sure I am understaning it correctly. My attempt at translation is: “It was said that there was a temple on the hill (dedicated) to the god Quirinus Romulus, who is called the same Quirinus (i.e., who was known by the same name).” It just occurred to me that perhaps Quirinali is ablative agreeing with colle, so “on the Quirinal hill.” I really do not understand the reference. I would be grateful for any help.
Indeed, it does help. I now see my first error. I should have taken Quirinali as an ablative agreeing with colle, thus “on the Quirinal hill.” The reference to L&S clears up my difficulty with idem.