We may regard it as a very striking coincidence, that in the same year which witnessed the production of Peri's "Euridice" at Florence, the first oratorio was performed at Rome, in the church of S. Maria in Valicella, then recently built by St. Philip Neri, the founder of the congregation of the Oratorians. St. Philip, a friend of Palestrina, was a firm believer in the power of sacred music, and its utility as a means of exciting healthy devotional feeling. For the purpose of encouraging a general love for it, he warmly supported the guild or brotherhood called the Laudisti. On certain solemn occasions this order paraded the streets singing hymns of a melodious character, called "laudi spirituali," one of which--"Alia trinità beata"--is still to be heard as a popular hymn-tune. It was probably in the oratory attached to the new church, that the first oratorio was performed, in the month of February, 1600; and it is certain that it was from the name of the edifice that this form of composition derived its name. The title of the first oratorio was "La Rappresentazione dell' Anima e del Corpo" (The representation of the Soul and the Body). The words were by Laura Guidiccioni and the music by Emilio del Cavalieri. The subject was allegorical, and the style of the music was that of the monodic school, a style wholly declamatory and recognizing no distinction whatever between recitative and air. The inventor and the early masters of the oratorio treated this "sacred drama" more in the manner of the miracle-plays than in that of classical tragedy. The broad distinction between the mediæval miracle play--which, for a long time, had been popular in Italy, France, Spain, England and Germany--and the oratorio, was that while in the former the dialogue was spoken, in the latter it was recited to musical notes. The oratorio, in fact, as invented by Emilio del Cavalieri was neither more nor less than an opera, based on a sacred subject; and in Italy it never assumed any other form. Other attempts of the same epoch were made by Kapsberger, a German living in Rome: also by Loreto Michelangiolo Capellina, "Il lamento di S. Maria Vergine" (1627); by Stefano Landi, "S. Alessio" (1634); and by Michelangiolo Rossi "Erminio sul Giordano" (1637). The most successful, however, was Domenico Mazzocchi's "Repentimento di S. Maria Maddalena." Another important composer in this epoch, and connected chiefly with the early evolution of oratorio style, was Ludovico Viadana (Mantua) who wrote concerti da chiesa (church-concertos), pieces for one or more voices with an organ-bass, and thus introduced into chamber music the newly invented monody of Caccini. He is also the first prominent writer who used the basso continuo, so called because it continues with the upper chief melody and gives it a steadfast, harmonic basis. The long-cherished belief that Viadana was the inventor of this device is erroneous.