Francesca Casanova (asker) Apr 17, 2015:

Yes, only one L ;)

thefastshow Apr 17, 2015:

Here you can see different types of masonry:
http://www.google.de/imgres?imgurl=http://archeologiamedieva...

The simple filaretto masonry could be translated as rustication, whereas if you talk about the more skillful bossed filaretto generally used for plinths, bases etc. we would talk about bossage. The bossed filaretto has distinct carved/chiselled edges.

thefastshow Apr 17, 2015:

In contrast to "coursed rubble masonry" the material used in filarettos is limited to limestone/calcareous sandstone of generally nearby, local quarries.

Also the filaretto is a coursed masonry using dressed stones of more or less rectangular shape whereas the coursed rubble masonry could also resemble something like a cyclopian masonry using differently shaped stones:http://www.civilprojectsonline.com/building-construction/spe...

Though the size of stones used in a filaretto usually also differs, the course work results in fascinating geometric ensembles.
http://it.wikipedia.org/wiki/Filaretto#/media/File:Torre_deg...

philgoddard Apr 17, 2015:

You've spelt it in two different ways. One L appears to be correct: http://it.m.wikipedia.org/wiki/Filaretto