[anon291]

I recommend attending a traditional Catholic requiem mass for the dead on all souls day. It explains everything about Halloween decor.

The church is draped in black and lit only by unbleached beeswax candles, hence the black and orange for Halloween.

And there might be skulls or bones (relics) if the church is important enough.

[AStonesThrow]

Mozart's Requiem - All Souls Solemn High Mass https://www.youtube.com/live/9bRSLZQr7kU?si=TzyHzkJvV5-L2Mi6

[anon291]

Nice. Here's the one from last year and you can see all the elements:

https://www.youtube.com/live/D8x3s6h5f5M

1. The orange candles around the coffin and the altar

2. The black draped coffin and black garments worn by the priests

3. On the left and right side of the altar you can see what I presume are relics (bones and personal accoutrements of saints)