Most of the nineteenth century saw little change in the religious composition of Luxembourg's population, with only a marginal increase in the number of Protestants. However, towards the end, tens of thousands of German immigrants, many of whom were Lutheran or Calvinist, moved to Luxembourg to work in the steel industry.
Throughout most of the nineteenth century, Luxembourg’s population maintained its religious composition without significant changes, with a slight increase in Protestants. Nonetheless, toward the latter part, numerous German immigrants, predominantly Lutheran or Calvinist, migrated to Luxembourg for employment in the steel industry.