<P> The Green Monster is a popular nickname for the 37.2 feet (11.3 m) high left field wall at Fenway Park, home to the Boston Red Sox baseball team . The wall is 310 feet from home plate and is a popular target for right - handed hitters . </P> <P> The wall was part of the original ballpark construction of 1912, along Fenway's north side facing Lansdowne Street . It is made of wood and was covered in tin and concrete in 1934 . It was then covered with hard plastic in 1976 . A manual scoreboard is set into the wall, which has been there, in one form or another, at least as far back as 1914 (see photo at right). Despite the name, the Green Monster was not painted green until 1947; before that, it was covered with advertisements . The Monster designation is relatively new . For most of its history it was simply called "The Wall ." </P> <P> The Green Monster is the highest among the walls in current Major League Baseball fields, and is the second highest among all professional baseball fields (including minor leagues), falling approximately 6 inches short of the left field wall at the PeoplesBank Park in York, Pennsylvania . </P>

When was the green monster added to fenway park