This is the text that I can see. Hopefully you will be able to view the image if I can add it.
I've tried various translation sites but nothing is really working. I could makes guesses but I'm very curious exactly what it says and means. V's could be U's and this headstone is located in Memmingen, Stadtkreis Memmingen, Bavaria (Bayern), Germany.
MORTALITI SVA MEMOR
REIP MEMMING SENATI
MDCCVI DIE XXIV APRS (April 24 1706?)
MONVMENT HOC SEPVLCRALE
SIBI POSTERISQVE SVIS
Here is a link to the image.