The Italian folk revival was accelerating by 1966, when the Istituto Ernesto de Martino was founded by Gianni Bosio in Milan to document Italian oral culture and traditional music. With the emergence of the Nuova Compagnia di Canto Popolare in 1970, the notion of a musical group organized to promote the music of a particular region (in this case, Campania) was clearly gaining momentum. Many of the best known Italian folk revival bands got their start in the following decade, including La Lionetta (1977), Tre Martelli (1977), La Ciapa Rusa (1978), Re Niliu (1979), Calicanto (1981), and Baraban (1983). Northern & central Italy The northern regions of Italy historically exhibited Celtic and Slavic influences in their cultures. Roots revivalists have revived traditional songs, though, from Piedmont (La Ciapa Rusa, Tre Martelli), Lombardy (Barabàn, Pandemonio) and Veneto (Calicanto). The Genoese docks are the home of trallalero, a polyphonic vocal style with five voices, one of which imitates a guitar. It arose in the 1920s and includes modern groups like La Squadra -- Compagnia del Trallalero and Laura Parodi. The highly urban provinces of northern and central Italy are also known for the medieval sung poetry ottava rima, especially in Tuscany, Lazio and Abruzzo. Ottava rima is performed by the poeti contadini (peasant poets) who use the poems of Homer or Dante, as well as more modern lyrics which address political or social issues. It is often completely improvised, and sometimes competitive in nature. Tuscan folk poetry is closer in form and style to high-culture poetry than is typical elsewhere in Italy. The saltarello dance is also popular throughout the region. Canzoniere del Lazio is one of the biggest names from central Italy during the 1970s roots revival. With socially aware lyrics, this new wave of Italian roots revivalists often played entirely acoustic songs with influences from jazz and others. More modern musicians in the same field include Lucilla Galeazzi, La Piazza and La Macina. Southern Italy A folk dance called the tarantella is still sometimes performed. It was performed to cure the bite of Lycosa tarantula, usually with female victims dancing until exhaustion. Performers used varying rhythms according to the exact kind of spider. Antonio Infantino has explored the percussion-based tarantolati healing rituals since 1975, when he formed the group Tarantolati di Tricarico. Puglia is also home to brass bands like Banda Cittá Ruvo Di Puglia; this tradition has led to