Robin has no idea where or what "Rome" is, so the significance of the mention is completely lost on him. He's just busy watching the way blood seems to ooze its way out of his lovely-colored eyes.

That is, until, his reference to location is questioned and Robin has to focus again to figure out what he's talking about.

"In that..." He points vaguely to his left, unhelpfully, "...Temperate biome, I think it's called." And then, a second later, he raises an eyebrow, "You do know that we're in a building, right?"