🌐EnglishEnglishDeutschNederlandsفارسیEntityQ1740348· pop 5· linked from 52 articlesKeystone BuildingAlso known as 99 High Street, 99 High, 99 High Sthigh-rise office building in Boston, Massachusetts, United StatesWikidata factsOfficial website99highboston.comImageKeystone Building (Boston) - SA06939.JPGSources (1)en.wikipedia.orgvia Wikidata · CC0On the mapAvailable in 4 languagesCroatianEgyptian Arabicفارسیvia Wikidata sitelinks · CC0ConnectionsBostonEntitygeographic coordinate systemEntityCategoriesOffice buildings completed in 1971Skyscraper office buildings in Boston