Bydd y trethi cyntaf i gael eu gwneud yng Nghymru ers bron i 800 o flynyddoedd yn cael eu cyflwyno ymhen blwyddyn pan fydd treth dir y dreth stamp a'r dreth tirlenwi yn cael eu datganoli.
The devolution of tax powers to Wales marks a significant milestone in devolution as Wales will become responsible for raising a proportion of its own revenue to spend on public services.