That PERSON@1 painted the PERSON@2 and that he was chosen by the Comune of LOCATION@1 in NUMBER@1 to design the new campanile -LRB- bell tower -RRB- of the Florence Cathedral are among the few certainties of his biography .

It is known that in NUMBER@1 PERSON@1 was chosen by the `` commune '' -LRB- town council -RRB- of LOCATION@1 to design the bell tower next to LOCATION@2 which was being built at that time .
