Francisco Gregorio Billini (Santo Domingo Metro)  Francisco Gregorio Billini is a Santo Domingo Metro station on Line 2. It was open on 1 April 2013 as part of the inaugural section of Line 2 between María Montez and Eduardo Brito. The station is located between Pedro Francisco Bonó and Ulises Francisco Espaillat. This is an underground station built below Avenida John F. Kennedy. It is named in honor of Francisco Gregorio Billini.