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| Photo: Yap-Sandiego Ancestral House. |
The Yap-Sandiego Ancestral House was initially owned by Chinese merchants Don Juan Yap and Doña Maria Florido. It is one of the oldest residential houses in the Philippines. It was built between 1675 and 1700 and was made from coral stones; egg whites were used as glue, and "Tigas" or clay was used for the roof. The wooden parts of the house were made of "balayong" and "tugas" or molave, the hardest woods in the country.