St Aloysius College was built in 1882. The southern wing of the building formed the Chapel as a place of prayer for students. The Chapel built in 1885 by Rev Father Joseph Willy, is a replica of world renowned Sistine Chapel at Rome. The main part of this chapel is a large hall, which is called the nave. On either side of the nave are the two aisles. The raised platform is called sanctuary. Touching the wall of the sanctuary is the main alter

The St Aloysius College Museum "Aloyseum" was started in 1913 by the Italian Jesuit Fr Chiapi with minerals, herbarium and a collection of Roman coins, a gift of the Collegio Vieta, Italy. It has now been shifted from the ‘Red Building’ to its present location close to the Chapel which gives easy access to visitors especially those coming to see the chapel paintings.

The St Aloysius College Museum "Aloyseum" was started in 1913 by the Italian Jesuit Fr Chiapi with minerals, herbarium and a collection of Roman coins, a gift of the Collegio Vieta, Italy. It has now been shifted from the ‘Red Building’ to its present location close to the Chapel which gives easy access to visitors especially those coming to see the chapel paintings.

The management of St Aloysius College(Deemed to be University) recognises that forests, coasts, water bodies, ground water and biodiversity are all important prerequisite for life on this planet and sustainable development. St. Aloysius College(Deemed to be University) is conscious and committed to the environmental issues with regard to protection, conservation and sustenance of natural resources. Al-Vana is an endeavour to realise such a lofty objective.

The Aloysius Swimming Pool of Olympic standard is the first of its kind in the region. It is dedicated to the city as it will be able to host major events that require national or international level facilities. The main pool is 50 meters long and 25 meters wide and the complex is also equipped with a kids’ pool and other necessary infrastructure.

St Aloysius (Deemed to be University) Ranga Adhyayana Kendra (Center for Theater Studies) was established in the College to provide a platform for students to ehibit their talents thereby inculcating social responsibility and social awareness among the students as well as encouraging the art ingrained in them. It is possible to create social awareness through performing arts.

Under the shades of plenty of trees, there is an open air theatre in the Main Campus of the College which is named after Mother Teresa. The space, known as 'katte' was named after Mother Theresa on September 3rd, 2016 to commemorate the canonization of Blessed Mother Theresa of Kolkata.

This facility is created for the children of all the staff under the Mangalore Jesuit Educational Society. Being centrally located in the campus at Kodialbail, Mangaluru, this day care center is easily accessible to the staff of Primary School, High School, St Aloysius Gonzaga School, PU College and the Degree College.