Orient Square
 The Orient Square (officially The Orient Square Building or Orient Square IT Center acronym: OSB or use as a code: OS) is a first-class high-rise and tallest building along Ortigas Center's main road F. Ortigas Jr. Avenue (known as Emerald Avenue) in Pasig City Philippines. It rises 160 metres from ground level to roof and is currently the 5th tallest complete building in Pasig City and the 25th tallest building in the Philippines.