The Orthodox church in Mar del Plata was originally planned as a church in honor of Saint Nicholas, the Miracle Worker of Myra, the patron saint of sailors and travelers. However, when the Church was on the brink of historical reunification, the family of the Royal Martyrs played an important role in overcoming the disagreements. The martyr-king Nicholas II and his family once caused a split in Russia into two opposing camps, and now they were to become a symbol of the unification of Russians abroad with their historical Motherland and Mother Church. Therefore, by the blessing of the Holy One and the decision of the Holy Synod, it was decided to name the new church in honor of the Royal Martyrs. The official construction of the church was completed in 2009. The iconostasis for the new church was brought from Buenos Aires, from the church of 'All Saints Who Shone in the Land of Russia.'

Services in the church are held in Church Slavonic. Argentinians and locals often come here, and the texts, sermons, or parts of the service are translated into Spanish for them.

The rector of the church, Hieromonk Gerasim, shared: 'Mainly, Russians, Ukrainians, and Belarusians come to the services. I am surprised when Argentinians, not knowing the Russian language, let alone Church Slavonic, stand for a long time during the service, listening to the prayers; it is evident that they are praying. It is amazing how reverently they treat Orthodox relics, approaching the cross, kissing the icons, and receiving blessings.'