The Gordon and Betty Moore Foundation has contributed US$200 million towards construction of the Thirty Meter Telescope. A proposed extremely large telescope (ELT), the Thirty Meter Telescope (TMT) is considered controversial due to its planned location on Mauna Kea, which is considered sacred land according to the native Hawaiians, on the island of Hawaii in the United States. Native Hawaiian cultural practice and religious rights are the main points of opposition towards the construction of the Thirty Meter Telescope, along with concerns over the lack of meaningful dialogue during the permitting process.