name          city  height (m)  height (ft)  floors years as tallest
0                 commerzbank tower     frankfurt         259          850      56   1997 - present
1                         messeturm     frankfurt         257          843      55      1990 - 1997
2                        silberturm     frankfurt         166          545      32      1978 - 1990
3                      westend gate     frankfurt         159          522      47      1976 - 1978
4                colonia - hochhaus       cologne         147          482      42      1973 - 1976
5           city - hochhaus leipzig       leipzig         143          468      36      1972 - 1973
6                  bayer - hochhaus    leverkusen         122          400      29      1963 - 1972
7  friedrich - engelhorn - hochhaus  ludwigshafen         102          335      28      1957 - 1963

Table as JSON:
{"name":{"0":"commerzbank tower","1":"messeturm","2":"silberturm","3":"westend gate","4":"colonia - hochhaus","5":"city - hochhaus leipzig","6":"bayer - hochhaus","7":"friedrich - engelhorn - hochhaus"},"city":{"0":"frankfurt","1":"frankfurt","2":"frankfurt","3":"frankfurt","4":"cologne","5":"leipzig","6":"leverkusen","7":"ludwigshafen"},"height (m)":{"0":259,"1":257,"2":166,"3":159,"4":147,"5":143,"6":122,"7":102},"height (ft)":{"0":850,"1":843,"2":545,"3":522,"4":482,"5":468,"6":400,"7":335},"floors":{"0":56,"1":55,"2":32,"3":47,"4":42,"5":36,"6":29,"7":28},"years as tallest":{"0":"1997 - present","1":"1990 - 1997","2":"1978 - 1990","3":"1976 - 1978","4":"1973 - 1976","5":"1972 - 1973","6":"1963 - 1972","7":"1957 - 1963"}}