What is Waltham, Massachusetts?
{{Infobox settlement | official_name = Waltham, Massachusetts | nickname = The Watch City | motto = | image_skyline = Waltham (Massachusetts) City Hall.jpg | imagesize = | image_caption = City Hall | image_seal = Seal of Waltham, Massachusetts.png | image_flag = | image_map = Middlesex County Massachusetts incorporated and unincorporated areas Waltham highlighted.svg | mapsize = 250px | map_caption = Location in Middlesex County in Massachusetts | image_map1 = | mapsize1 = | map_caption1 = | pushpin_map = Boston Metro#Massachusetts#USA | pushpin_label = Waltham | pushpin_label_position = bottom | subdivision_type = [[List of sovereign states|Country]] | subdivision_name = United States | subdivision_type1 = [[U.S. state|State]] | subdivision_name1 = [[Massachusetts]] | subdivision_type2 = [[List of counties in Massachusetts|County]] | subdivision_name2 = [[Middlesex County, Massachusetts|Middlesex]] | established_title = Settled | established_date = 1634 | established_title2 = Incorporated as a Town | established_date2 = 1738 | established_title3 = Incorporated as a City | established_date3 = 1884 | government_type = [[Mayor-council government|Mayor-council city]] | leader_title = [[Mayor]] | leader_name = | leader_title1 = <!--Board of <br>&nbsp;&nbsp;&nbsp;Selectmen--> | leader_name1 = | area_magnitude = | area_total_km2 = 35.64 | area_total_sq_mi = 13.76 | area_land_km2 = 33.01 | area_land_sq_mi = 12.74 | area_water_km2 = 2.63 | area_water_sq_mi = 1.02 | population_as_of = [[2020 United States Census|2020]] | settlement_type = [[City]] | population_total = 65218 | population_density_km2 = 1975.99 | population_density_sq_mi = 5117.95 | elevation_m = 15 | elevation_ft = 50 | timezone = [[Eastern Standard Time Zone|Eastern]] | utc_offset = −5 | timezone_DST = [[Eastern Stand