The idea of continuous prayer existed in the Church from the beginning. "Pray without ceasing" (1 Thess. 5:17) - St. Paul the Apostle said. The Middle Ages brought us Eucharistic adoration outside of the Holy Mass. probably inspired by the adoration of the relics of saints. These two elements can be combined and we will have constant adoration day and night all week, which is 168 hours a week.
The believing in the presence of Christ under the species of bread stand before Him day and night, constantly, changing one another, of course, every hour or every few hours. For this, one needs at least 168 people (this is the number of hours a week) ready to undertake permanent duty. The church is open 24 hours a day. Everyone can come and meet Christ in the Blessed Sacrament by faith. Old and young, children and teenagers come. They come here from all over the town and beyond. It happens that people from even distant cities take permanent shifts. Children and teenagers come before the tests, students before the exams. Sometimes on Sunday morning some young people come after the parties. Hundreds of people come every day to meet Christ. Many of them experience special graces or ask for them.
(Cf. Ks. Bolesław Szewc, Zmierzyć się z adoracją 168 godzin na tydzień. Krajowe Fora wieczystej adoracji Najświętszego Sakramentu w Parafiach, in: edit. Edgar Sukiennik, Jezu Miłosierny Tobie ufać chcę. Księga Pamiątkowa dedykowana ks. kan. dr. Zbigniewowi Godlewskiemu proboszczowi Parafii Świętego Józefa Oblubieńca Najświętszej Mari Panny Dziekanowi Dekanatu Wolskiego w 35. rocznicę kapłaństwa i 60. rocznicę urodzin, Vol. I, Warszawa 2020, p.424-436.)