The Sai’one Centenary Church, also known as the Free Wesleyan Centenary Church in Tongatapu, is a majestic building often referred to as the Royal Church, attended by Tonga's royal family. Founded in 1885 by King George Tupou I, this church offers a welcoming atmosphere for visitors of all denominations. Attendees can experience the resounding acapella harmonies of the congregation during the Sunday service at 10 am, adding to the cultural and spiritual richness of Nuku'alofa.