By Lucy Craymer and Lewis Jackson WELLINGTON (Reuters) -Tens of thousands of New Zealanders rallied before parliament on Tuesday in one of the country's largest ever protests to oppose a bill that opponents say seeks to dilute the rights of Maori and threatens to set race relations back decades.

Nine-day march across New Zealand culminates in Wellington as huge numbers gather to protest bill that opponents say seeks to dilute Māori rights.   00:31 Reportage from Eva Corlett earlier this year on the impact of proposed legislative changes on Aotearoa New Zealand’s Māori

A proposed bill would revise the country's foundational treaty with Maori people and is hugely unpopular. Here's what to know.