One of only two remaining advertising signs of its type in the area, the other being the Citgo sign in Boston, I pass this Shell sign when I return from work late at night. Located adjacent to Memorial Drive since 1944, it was built in 1933 and originally located on the Shell Company building on Commonwealth Avenue. In 2001 it was on the verge of collapse and looked like HELL (the “S” lamps had burned out). In 2005 it was turned off for good. After two failed attempts, the Cambridge Historical Commission eventually designated the sign a Cambridge landmark and in 2011, a replica, built using LED technology instead of neon and incandescent bulbs, replaced the original and has been enjoyed by all but its closest neighbors since.