The Capitol building is surrounded by of grounds scattered with statues and monuments. William Munro Johnson, civil engineer, was hired in 1888 to improve the appearance of the grounds. By the time the first monument, commemorating the Heroes of the Alamo, was installed in 1891, the major components of Johnson's plan were in place. These included a "Great Walk" of black and white diamond-patterned pavement shaded by trees. The four oldest monuments are the Heroes of the Alamo Monument (1891), Volunteer Firemen Monument (1896), Confederate Soldiers Monument (1903) and Terry's Texas Rangers Monument (1907), and these flank the tree-lined Great Walk. In the spring of 2013, ground was broken for the Texas Capitol Vietnam Veterans Monument; dedication took place on March 29, 2014.