Tens of thousands of people have marched on the New Zealand parliament in Wellington to protest against a bill that critics say strikes at the core of the country’s founding principles and dilutes the rights of Māori people.

A proposed law that would redefine New Zealand’s founding treaty with its Indigenous people has triggered political turmoil. Here's what to know.

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.