After four years of preparations, the International Eucharistic Congress in Budapest will kick off this Sunday.
Its organizers have put together this video to show how they are setting up the the Congress' main venue.
Thousands will gather in Hungary throughout the week, and hundreds of thousands are expected to attend the closing Mass celebrated by Pope Francis.
The Congress will open with a Mass in which over one thousand children will receive their first communion.
KORNÉL FÁBRY
Secretary General, International Eucharistic Congress in Budapest
They are from different parts of Hungary, and also from outside of Hungary, because there are a lot of Hungarian people in Slovakia, Romania, Serbia and Croatia... And we welcome every child who is in a state to receive the communion.
Eucharistic Congresses are a reminder to Catholics that Jesus is truly present in the Eucharist. They include opportunities for Eucharistic adoration, Masses celebrated in various languages, catecheses, and testimonies of personal experiences with the Eucharist.
Pope Francis wanted to personally participate in this year's Congress to highlight the event's importance.
He will celebrate the Congress' closing Mass on September 12 in Budapest's iconic Heroes' Square. Organizers say they are expecting more than 120,000 people to attend.
JMB
TR: JM