A church may be called a basilica because of a particular event (miracle, pilgrimage) or because there are relics in it. The name is largely honorific and the right to be called basilica is given by the Pope. A church may be called a cathedral when it is the seat of the diocese (and hence headed by a bishop), which is not the case for the basilica of the Sacré-Coeur.
A Basilica is indeed bigger than a Cathedral. The Rank goes: Church, Cathedral, and finally Basilica. The Vatican is a Basilica.
If you are referring to St. Mark's in Venice, Italy, the Church is dedicated to him and his relics are held there.
Ordination is when a person becomes a priest in the Catholic church and is held in a cathedral or the Basilica in Rome.
The first building was a basilica (destroyed by fire) and then it was rebuilt as a Cathedral.
Saint-Michel Basilica-Cathedral was created in 1959.
Basilica of St. Joseph Proto-Cathedral was created in 1823.
If you are referring to St. Mark's in Venice, Italy, the Church is dedicated to him and his relics are held there.
St. Peter's is a basilica in Vatican City.
Balthazar, one of the three wise men, was declared a saint by the early Church. He was never formally canonized. His purported relics are held in the cathedral in Cologne, Germany.
YEs it has a relic of jesus
Some basilicas have major relics of saints, some do not. The Basilica of Saints Peter and Paul in Rome has the heads of both saints. The Basilica of Saint Mark in Venice has the relics of saint Mark and the Basilicas of Saint Francis of Assisi and Saint Clare of Assisi hold the relics of their namesake saints.