pallarium is incorrectly written, and should be written as "algerian" being its meaning: I will try to give you an approximate answer, as my latin is not very broad. We're going for parties, mean stall?, means wide Street, courtyard, corral, wide and spacious place in town, by extension it gave this name to the pallarium which could be interpreted as a dress with pallium ( in 41 men; and palla in the woman, that was actually a mantle of origin Greek, despised by the Roman and characteristic of the people common, them philosophers, pedagogues and later of them Christian. If we see the provision of a modern theatre, we sided boxes ( usually more expensive ) and the Center, occupying the whole room; the Silver's price more affordable. Then, the space wide, the poultry, the courtyard, where is located that people that wore pallium and palla is called pallarium and later stall, by be the locations more cheap in relation to them boxes.