Babban kararrawa, wanda a hukumance aka sani da Babban Kararrawa amma aka fi sani da Big Ben, shine kararrawa mafi girma a cikin hasumiya kuma wani ɓangare na Babban Agogon Westminster. Yana sauti kamar E-na halitta sau biyu.Asali kararrawa ya kasance kararrawa mai nauyin tan 16 (16.3-ton) wanda aka jefa a ranar 6 ga Agusta 1856 a Stockton-on-Tees da John Warner & Sons. Ana tsammanin cewa an fara kiran kararrawar Victoria ko Royal Victoria don girmama Sarauniya Victoria, amma cewa wani dan majalisa ya ba da shawarar sunan kararrawar na yanzu "Big Ben" a lokacin muhawara ta Majalisar; ba a rubuta sharhin a cikin Hans Denard ba.Tun da ba a gama hasumiyar ba tukuna, an saka kararrawar a New Palace Yard, amma a lokacin gwaji ya karye fiye da gyara kuma dole ne a maye gurbinsa.
10 ga Afrilu 1858