Final answer:
The architect of Manila City Hall is the renowned Filipino architect Juan Arellano, known for his contribution to Manila's architectural landscape.
Step-by-step explanation:
The architect who designed the Manila City Hall was neither Antonio Toledo nor the other renowned architects such as Daniel Burnham or Ralph Harrington Doane. Manila City Hall's architect was the esteemed Filipino architect Juan Arellano, who was deeply involved in the development of Manila's architectural landscape during the American colonial period. Juan Arellano's work on the Manila City Hall is considered a heritage structure in the Philippines and is significant for its emblematic clock tower, making it one of the most recognizable landmarks in Manila.