The Chicago Board of Trade Building was the tallest building in Chicago for some 35 years by conventional definitions. At  and 48 stories, One North LaSalle was the fourth tallest building (fifth tallest after the completion of the LaSalle National Bank Building) structure for approximately the same period.
The Chicago Board of Trade Building was the tallest building in Chicago for approximately 35 years by conventional standards. One North LaSalle held the fourth position (fifth after the completion of the LaSalle National Bank Building) as a structure, roughly around the same time period.