Thank you Fomogo ! We love it too, the screened in porch has it, and the front porch does too.
Yes, Gerry, exactly...broken pieces of terra cotta tile....they call it a "broken tile" floor.
I'm sure at one point it was done out of frugality...but it became so popular around here (just outside Charlotte) in the 50's and 60's, that they would literally start with whole pieces of tile and break them, then figure out how they wanted to lay them. It's neat how they did it though, because it is as level and flat as if it were 4x4 or 6x6 whole tiles.