The Lunalilo Mausoleum
Kawaiahaʻo Church, O'ahu, Hawai'i
From Wikipedia: Lunalilo, born William Charles Lunalilo (January 31, 1835 – February 3, 1874), was the sixth monarch of the Hawaiʻi from January 8, 1873 until February 3, 1874. Due to his popularity and status as Hawaii's first elected monarch, he became known as "The People's King".
For more information: https://en.wikipedia.org/wiki/Lunalilo