House church, or "home church", (Chinese: 地下天國; literally "Underground Heaven") or in Mainland China (Chinese: 家庭教会; literally "Family Church") is used to describe an independent assembly of Christians who gather in a home. Sometimes this occurs because the group is small, and a home is the most appropriate place to gather, as in the beginning phase of the British New Church Movement. Sometimes it is because the group is a member of an underground Christian movement, which is otherwise banned from meeting, as in China. Some recent Christian writers have supported the view that the Christian Church should meet in houses, and have based the operation of their communities around multiple small home meetings. They claim that this approach is preferable to public meetings in dedicated buildings because it is a more effective way of building community and it helps the group to engage in outreach more naturally. Some believe small churches were a deliberate apostolic pattern in the first century and intended by Christ.Cell churches are usually associated with larger churches: they also meet in homes and share some characteristics of house churches. They are not normally considered to be a house church, as they are not self-governing.

Francis Chan (born 1967) is an American preacher. He is the former teaching pastor of Cornerstone Community Church in Simi Valley, CA, a church he and his wife started in 1994. He is also the Founder and Chancellor of Eternity Bible College and author of the best-selling book, Crazy Love: Overwhelmed by a Relentless God, which came out in 2009. He released his second book Forgotten God: Reversing Our Tragic Neglect of the Holy Spirit in August 2009. He also sits on the board of directors of Children’s Hunger Fund and World Impact.

Chan is known for speaking at major national and international events and conferences.

Chan and his wife founded Cornerstone in 1994 with only 30 people. Within two months, the church had grown to 100 people, and by 2000, Chan was leading a $1 million project to provide for the 1,600 member congregation. Cornerstone is now one of the largest churches in Ventura County, California.

In 2005, Francis was the featured speaker in a now international video called Stop And Think (JustStopAndThink.com) which virally travelled, landing in every state and 30+ countries.

Nitty-gritty, Nitty Gritty, etc. may refer to: