About 45 years ago I worked in North Africa and spent an amount of time in Tripoli. I cannot recall the species, but many of the old roads in the city leading to the Suk in the old quarter and the castle were lined with pleached trees in the Italian style. They were very well looked after, too.Very common style of tree management in old Italian public parks, especially in the villages in Tuscanny..
Pleached trees are trained on a system of horizontal wires so a central trunk then pairs of branches trained off horizontally with about 16 inches between pairs.Curious. How is this any different than shaping hedges along sidewalks and driveways?
That would make sense. It was in the grounds of a former abbey that became a private house following dissolution.Known as pleaching, often done with lime trees, beech and hornbeam too. Iirc it's usually to provide shade to a walkway without interrupting the views or having the deep shade trees would cast.