In Norse Mythology the bridge leading from the realm of the mortals Midgård to the realm of the gods Asgård. The bridge itself is the rainbow and its guardian is the god Heimdall. The bridge is destroyed at the end of the world, Ragnarok. It as built by the Aesir.
... secures the admiration of Count Vronsky to the jealously of Dolly's sister Katarina (Kitty) whom he has previously been courting.
As the novel opens, Stiva's friend ...