The Assumption of Mary is the celebration of her being lifted body and soul (Assumed) into Heaven by Jesus Christ at the completion of her earthly life, and the Feast Day celebrating this is August 15th. This was declared as Dogma by Pope Pius XII in 1950. As a note, things aren't declared Dogma until their is a widespread disbelief in them; the Assumption of Mary is a belief that's been held by Christians since at least the 3rd Century.
Ex cathedra statements are rare declarations made by the Pope on matters of faith and morals that are considered infallible. One famous example is the doctrine of the Immaculate Conception, declared by Pope Pius IX in 1854. Another example is the doctrine of the Assumption of Mary, declared by Pope Pius XII in 1950. These statements are considered binding for all Catholics.
Pope John XIIII declared the 2000 Jubilee Year.
Pope Julius I
Pope John Paul II declared Juan Diego a saint.
Otto I got declared the Roman Emperor because he helped the Pope when he was struggling so the pope declared him the Roman Empire.
He was elected as pope on April 19, 2005.
The pope's mother has no special title. She is simply called the pope's mother. Pope Benedict XVI's mother is named Maria Ratzinger.
The Pope
the pope
No
The main problem for Elizabeth the first was proving she was worthy of the thrown. After the execution of her mother, the Pope declared Elizabeth as illegitimate and released her from her title.
Pope Julius I