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The Calamba City Hall, built in 2009, is made from Octagon-pine which holds the front and the back of the city hall. The Calamba City Council decided to design the new hall into an octagon shape, believed to be a unique city hall in the Philippines in the 21st century, which represents Calamba City as the new Regional Center of Region 4-A Calabarzon in the year 2003, followed by Lucena City in Quezon.