Trinity

Trinity Miniature, c. 1300 showing the seated God the Father and God the Son with the Holy Spirit as a dove between them
(from Anna Jameson, History of Our Lord)

Trinity, Holy Trinity Church Goodramgate,York Throne of Mercy © Raguin/MMK, East window, 1470. Trinity displayed as God the Father holding the dead body of God the Son in his arms; God the Holy Spirit appears as a dove between the heads of the Father (restored) and Son.

Trinity Crowning the Virgin Mary, Holy Trinity Church Goodramgate,York. Throne of Mercy © Raguin/MMK, East window, 1470.