Sundial Solartime DetectorSundial Solartime Detector is a Registered Property, Municipality of Tagudin, Ilocos Sur located at Tagudin, Ilocos Sur, Region I.
It was built in 1841 by an Augustinian friar named Fr. Juan Sorolla. It is believed to be the first Sundial in the Philippines.
The sundial is considered to be one of the earliest scientific instruments. It is used to measure time through casting a shadow from a gnomon (pointer, rod, bar) to a flat surface marked with time intervals.
There are only a few sundials built in the Philippines. Two of them are in Tagudin.