[1] He was born to Nicola Lasagni, Commander of the Sedentary National Guard, and his wife Carolina.
[1] Lasagni completed his doctorate in law in 1840[2] and then worked at the nuntiature of Paris from 1842 until 1851.
Pope Pius IX named him secretary of the Sacred College of Cardinals and the conclave.
Pope Leo XIII created Lasagni a cardinal in the consistory of 13 December 1880.
He died in 1885 and was buried in his family's tomb, Campo Verano cemetery, Rome.