When discussing wedding ceremony music with couples, I often find that, while they nearly always request some secular music, many couples want their spirituality reflected as well..irregardless of the wedding venue type itself.
This is easily accomplished by including a couple of songs which people tend to lump together and call them "church wedding songs".
To be sure, these songs can be placed in numerous parts of the ceremony, be they in the prelude or within the ceremony itself & can be strictly instrumental, congregant singing, or performed by a vocalist(s).
In fact, because of their very nature, most of the songs in this group have very nice lyrics which make them especially useful for vocalists & can add a very meaningful touch to a wedding.
Christian wedding songs are, well, just that!
However, in these categories, there is some overlap here between them.
For example, Catholic wedding songs are, of course, Christian songs and are therefore sometimes used in other denominations as well.
Here, they are simply separated out for ease of finding songs that are especially particular to the Catholic faith.
Wedding hymns is a category of its own simply because it is another subset of church wedding songs and are usually found in a church hymn book. No surprise there!
Alternatively, you could have a soloist perform a favorite hymn or have it performed in your prelude.
As mentioned above, the group Christian wedding songs speak for themselves and include the spectrum of traditional Christian wedding songs as well as the more contemporary Christian wedding songs.