The Transamerica Pyramid for decades has stood alone as San Francisco's architectural icon on the northern edge of downtown, but that could change if the city allows a flashy, cylindrical condominium tower to be built just yards away.

The Transamerica Pyramid for decades has stood alone as San Francisco's architectural icon on the northern edge of downtown, but that could change if the city allows a flashy, cylindrical condominium tower to be built just yards away.