Please refer to the following:
http://www.godssabbathtruth.com/catholicchurchchangedsabbathsunday.html
http://www.truthontheweb.org/cthlcmrr.htm
Also watch this:
https://youtu.be/HoUNifLYIN4
On a lighter note - below is a picture of the type of spiritual food being fed by the Catholic church to their followers:
