The cathedral ecclesiastical see is the Kathedrale Kerk van de HH Laurentius en Elisabeth, dedicated to Saints Lawrence and Elisabeth, in Rotterdam. The only minor basilica is Basiliek van de H. Liduina en Onze Lieve Vrouw van de Rozenkrans, dedicated to St. Liduina and Our Lady of the Rosary, in Schiedam.
It enjoyed a papal visit from Pope John Paul II in May 1985.
As per 2014, it pastorally served 531,600 Catholics (14.5% of 3,655,000 total, mainly protestants and atheists) on 3,403 km² in 75 parishes, with 358 priests (110 diocesan, 248 religious), 34 deacons, 452 lay religious (289 brothers, 163 sisters) and 6 seminarians.
(all Roman Rite)