The Church of the Holy Trinity is situated within the enclosure of the Sanctuary of Fátima, at the opposite side of the Basilica. It was inaugurated on the 12th October 2017, but had been planned since 1973. Circle-shaped 125 meters in diameter, it was designed by the greek architect Alexandros Tombazis. The main door is dedicated to Jesus Christ and has 12 side doors dedicated to the Apostles. The Basilica has 9 thousand seats.