Shown is a 12x12 stone post pergola.  A pressure treated post is covered with Georgetown cultured stone at the base, then wrapped with rough sawn oak.  The pergola top is also rough sawn oak.  Oak is a strong, relatively tight-grained lumber that weathers well untreated or may be stained.  The large beams and tapered posts of the stone post pergola give you an attractive haven for your backyard or patio.