Ambon (liturgy) in the context of "Holy Doors"

A sermon is a religious discourse or oration by a preacher, usually a member of clergy. Sermons address a scriptural, theological, or moral topic, usually expounding on a type of belief, law, or behavior within both past and present contexts. Elements of the sermon often include exposition, exhortation, and practical application. The act of delivering a sermon is called preaching. In secular usage, the word sermon may refer, often disparagingly, to a lecture on morals.

In Christian practice, a sermon is usually preached to a congregation in a place of worship, either from an elevated architectural feature, known as a pulpit or an ambo, or from behind a lectern. The word sermon comes from a Middle English word which was derived from Old French, which in turn originates from the Latin word sermō meaning 'discourse.' A sermonette is a short sermon (usually associated with television broadcasting, as stations would present a sermonette before signing off for the night). The Christian Bible contains many speeches without interlocution, which some take to be sermons: Jesus' Sermon on the Mount in Matthew 5–7 (though the gospel writers do not specifically call it a sermon; the popular descriptor for Jesus' speech there came much later); and Peter after Pentecost in Acts 2:14–40 (though this speech was delivered to non-Christians and as such is not quite parallel to the popular definition of a sermon).

A pulpit is a raised stand for preachers in a Christian church. The origin of the word is the Latin pulpitum (platform or staging). The traditional pulpit is raised well above the surrounding floor for audibility and visibility, accessed by steps, with sides coming to about waist height. From the late medieval period onwards, pulpits have often had a canopy known as the sounding board, tester or abat-voix above and sometimes also behind the speaker, normally in wood. Though sometimes highly decorated, this is not purely decorative, but can have a useful acoustic effect in projecting the preacher's voice to the congregation below, especially prior to the invention of modern audio equipment. Most pulpits have one or more book-stands for the preacher to rest his bible, notes or texts upon.

The pulpit is generally reserved for clergy. This is mandated in the regulations of the Catholic Church, and several others (though not always strictly observed). Even in Welsh Nonconformism, this was felt appropriate, and in some chapels a second pulpit was built opposite the main one for lay exhortations, testimonies and other speeches. Many churches have a second, smaller stand called the lectern located in the Epistle side, which can be used by lay persons, and is often used for other Scripture lessons and ordinary announcements. The traditional Catholic location of the pulpit to the left side of the chancel or nave has been generally retained by Lutherans and many Anglicans, while in Presbyterian and Baptist churches the pulpit is located in the centre behind the communion table. Many modern Roman Catholic churches have an ambo that functions as both a pulpit and lectern.

The gradual (Latin: graduale or responsorium graduale) is a certain chant or hymn in liturgical Christian worship. It is practiced in the Catholic Mass, Lutheran Divine Service, Anglican service and other traditions. It gets its name from the Latin gradus (meaning "step") because it was once chanted on the step of the ambo or altar. It is customarily placed after a reading of scripture.

In the Tridentine Mass, it is sung after the reading or chanting of the epistle and before the Alleluia, or, during penitential seasons, before the tract. In the Mass of Paul VI, the gradual is usually replaced with the responsorial psalm. Although the Gradual remains an option in the Mass of Paul VI, its use is extremely rare outside monasteries. The gradual is part of the proper of the Mass.

The soleas ((Greek: σολέα, other form σολέας) = Latin: solea meaning (“bottom, base”, as used in "sole of a shoe", cf. also the "sole" from the resemblance of fish to a flat shoe. Of uncertain origin)) is an extension of the sanctuary platform in an Eastern Orthodox temple (church building). The soleas projects beyond the iconostasis, forming a narrow walkway running the full length of the iconostasis.

In the center of the soleas is the ambon, directly in front of the Holy Doors, where the communicants stand to receive Holy Communion and where the clergy come out for public prayers, sermons, etc.