O fis Ebrill 2018 ymlaen, bydd Cymru'n dechrau casglu trethi am y tro cyntaf ers 800 o flynyddoedd, gan fod treth dir y dreth stamp a'r dreth dirlenwi yn cael eu datganoli.
From April 2018, Wales will start collecting taxes for the first time in 800 years as stamp duty land tax and landfill tax are devolved.