BRENNER PASS  , the lowest (4495 ft.) and one of the most frequented passes across the Alps in all ages, though the name itself rarely occurs in the middle ages, the route over it being said to lie through "the valley of Trent." It may be described as the great gate of Italy, and by it most of the Teutonic tribes made their way to Italy . One reason of its importance is that many side passes in the end join this great thoroughfare . It woks crossed no fewer than 66 times by various emperors, between 793 and 1402 . A carriage road was constructed over it as far back as 1772, while the railway over it was built in 1864-1867 . From Innsbruck to the summit of the pass is a distance by rail of 25 M . The line then descends through the Eisack valley past Brixen (34 m.) to Botzen (24 m.) . Thence it follows the valley of the Adige to Trent (35 m.) and on to Verona (562 m.)—in all 1744 M. by rail from Innsbruck to Verona . (W . A . B .