The original headquarters of the Watch Tower Bible and Tract Society was established in the 1880's, in Allegheny (now part of Pittsburgh), Pennsylvania.
Ntsindza wo sungula wa Watch Tower Bible and Tract Society wu simekiwe hi va-1880 endhawini leyi vuriwaka Allegheny (leyi sweswi yi nga xiphemu xa doroba ra Pittsburgh), exifundzheni xa Pennsylvania.