Eucharistic Congress

In the Catholic Church, a Eucharistic Congress is a gathering of clergy, religious, and laity to bear witness to the Real Presence of Jesus in the Eucharist, which is an important Roman Catholic doctrine. Congresses bring together people from a wide area, and typically involve large open-air Masses, Eucharistic adoration (Blessed Sacrament), and other devotional ceremonies held over several days. Congresses may both refer to National (varies by country) and International Eucharistic Congresses.

Saint Paschal Baylon is considered the Patron Saint of such Eucharistic Congresses.

The first International Eucharistic Congress owed its inspiration to Bishop Gaston de Ségur, and was held at Lille, France, on June 21, 1881. The initial inspiration behind the idea came from a laywoman, Emilie-Marie Tamisier (1834-1910) Marie-Marthe-Baptistine Tamisier who spent a decade lobbying clergy. The sixth congress met in Paris in 1888, and the great memorial Church of the Sacred Heart on Montmartre was the center of the proceedings. Antwerp hosted the next congress, from in 1890, at which an immense altar of repose was erected in the Place de Meir, and an estimated 150,000 persons gathered around it when Cardinal Goossens, Archbishop of Mechelen, gave the solemn Benediction. Bishop Doutreloux of Liège was then president of the Permanent Committee for the Organization of Eucharistic Congresses, the body which has charge of the details of these meetings. Of special importance also was the eighth congress, held in Jerusalem in 1893, as it was the first congress held outside Europe.

...
Wikipedia