Solemn Mass (Latin: missa solemnis), sometimes also referred to as Solemn High Mass or simply High Mass, is, when used not merely as a description, the full ceremonial form of the Tridentine Mass, celebrated by a priest with a deacon and a subdeacon, requiring most of the parts of the Mass to be sung, and the use of incense. The term "High Mass" is also used in the United States to describe the more common Missa Cantata, which lacks deacon and subdeacon and some of the ceremonies connected with them. The terms Solemn Mass, Solemn High Mass, and High Mass are also often used within Anglo-Catholicism in which the ceremonial and, usually, the text, are based on those of the Tridentine Mass. This article deals with Solemn Mass as celebrated according to the Tridentine use.