On Typika and Beatitudes
According to the Typikon of Violakis, the Typika (Psalms 102 and 145) and Beatitudes should be chanted every Sunday, unless a feast of Christ or the Theotokos, or its apodosis, falls on the same day. As Violakis writes in his Protheoria: "Every Sunday in the liturgy, the Typika and Beatitudes are chanted without fail (ἀπαραιτήτως) with their eight resurrectional troparia from the Octoechos. However, when the forefeast or afterfeast of Dominical or Marian feasts, or the memories of celebrated Saints fall on a Sunday, then four Resurrectional troparia are chanted with four troparia from the Sixth Ode of the Canon of the feast or saint." For the feast days of "celebrated" saints, Violakis also requires Typika and Beatitudes: "On the feast-days of celebrated saints, on whichever day of the week they may fall, the Typika are appointed without fail (ἀπαραιτήτως) , since the Saints do not have verses for Antiphons." In other words, the feast days of Sai...