This panoramic photograph of the Tower Bridge was taken by James Blakeway. It features one of London''s best known landmarks, the Tower Bridge, named after its own two impressive towers. Completed in 1894 and considered a masterpiece of its time, the middle of the bridge can be raised to permit large vessels to pass the Tower Bridge. It used to be raised about 50 times a day, but now is only raised 4 to 5 times per week. The bridge is 197 feet long and its towers rise to a height of 141 feet. To allow passage up the Thames of the large mastedships of the day, the bridge had to offer 140 feet of clearance.