Nicholas Callan and experimental philosophy under Dr. Cornelius Denvir. He introduced the experimental method into his teaching, and had an interest in electricity and magnetism. Callan was ordained a priest in 1823 and went to Rome to study at Sapienza University, obtaining a doctorate in divinity in 1826. While in Rome he became acquainted with the work of the pioneers in electricity such as Luigi Galvani (1737–1798) who was a pioneer in modern obstetrics and Alessandro Volta (1745–1827) who is known especially for the development of the electric battery. In 1826, Callan returned to Maynooth as the new Professor of Natural Philosophy
Memorial to Alessandro Valtrini case of Alessandro Valrtrini monument, a medallion-shaped portrait of Valtrini himself. Valtrini had been a wealthy donor during his lifetime. Three churches he had supported erected monuments to him, Il Gesù (where his body remained), Santa Maria sopra Minerva and the Bernini version in San Lorenzo in Damaso. He died in 1633. Francesco Barberini organised the Bernini commission in the late 1630s. Memorial to Alessandro Valtrini The Memorial to Alessandro Valtrini is a funerary monument designed by the Italian artist Gian Lorenzo Bernini in 1639, and executed by his workshop in the same year. It is situated in the church