The Filipinos were compelled to work in construction of a municipal building, churches cutting of timbe etc. What do you called this system?

The system you are referring to is known as "polo y servicios," which translates to "forced labor" in English. This practice was instituted during the Spanish colonial period in the Philippines, where Filipino males were required to provide labor for public works, such as the construction of municipal buildings, churches, roads, and other infrastructure projects.

The "polo y servicios" system was part of the larger colonial framework that aimed to exploit the resources and labor of the native population for the benefit of the colonial government and its interests. Men were compelled to work for a set number of days each year, and the system was often criticized for its harsh conditions and exploitation. The practice reflected the broader themes of colonial oppression and contributed to the growing dissatisfaction among Filipinos, which eventually played a role in the struggle for independence.