还愿，是一种向神祇许下心愿，应验后对神祇、庙宇或者是社会进行回馈的行为。

An ex-voto is a votive offering to a saint or to a divinity. It is given in fulfillment of a vow (hence the Latin term, short for ex voto suscepto, "from the vow made") or in gratitude or devotion. Ex-votos are placed in a church or chapel where the worshiper seeks grace or wishes to give thanks. The destinations of pilgrimages often include shrines decorated with ex-votos.