 It was built on the corners of Ayala and Makati Avenues, after which they are named.In 1994 the hotel was renovated, with a new fountain and some of the hotels walls was painted new colors

The Pen consists of two wings, which host all 497 rooms and suites.In 2000, the hotel's fountain area, fronting the corner of Ayala and Makati Avenues, was the scene of Filipino singer Regine Velasquez for her performance of the country's millennial theme "Written In The Sand" together with 2,000 children, televised in 67 broadcast networks throughout the world to coincide with midnight in Manila for the BBC's millennium special 2000 Today.