Meza-terza (half third), from the time of the day since it rang between sunrise and Third Hour (Terce), the traditional moment of the liturgical mid-morning prayer. At the end of the thirty minutes, holy mass was celebrated in St Mark's. Also, the workday began for the workmen in the Arsenal, the artisans da grosso (heavy mechanical trades), and government officials. Labourers who were not present for work did not receive full wages for the day. Shop hours and the workday of some artisan guilds were regulated by the Realtina, the bell located in the tower of the Church of San Giovanni Elemosinario at Rialto. Third Hour was signalled by the ringing of the Marangona (15 series of 16 strokes). The Nona derived its name from Ninth Hour (Nones), the traditional moment of the liturgical afternoon prayer. It sounded (16 series of 18 strokes) at midday and marked the beginning of the work break. After the Nona ceased, a half hour of silence ensued. The Trottiera then rang continuously for 30 minutes: from this particular function, the Trottiera was also termed Dietro Nona (behind, or after, Nona). When the ringing stopped, work began again. An hour later, the Nona rang (9 series of 10 strokes for three times) to mark the vespertine Ave Maria which was followed by the Marangona (15 series of 16 strokes). The Marangona rang (15 series of 16 strokes) at sunset which corresponded to 24 hours and the end of the workday for the Arsenal, the heavy mechanical trades, and the government offices. An hour after sunset, the Meza-terza rang for 12 minutes, signalling that the night watch was required to be present in Saint Mark's Square. After a twelve-minute pause, the Nona rang for 12 minutes. This indicated that letters were to be taken to Rialto for dispatch. After another 12 minutes, the Marangona struck for 12 minutes, ending at two hours after sunset. The night watch then began. The Realtina signalled the moment to extinguish fires in the homes. Midnight was marked by the ringing of the Marangona (16 series of 18 strokes). Public executions The smallest bell, known alternatively as the Renghiera, Maleficio, or Preghiera, signalled public executions by ringing for 30 minutes. The bell had previously been located in the Doge's Palace and is mentioned in connection with the execution for treason of Doge Marin Falier in 1355. In 1569, it was moved