Article discussing porphyry's role in public places and the Streets as Places Initiative
The use of stone paving such as Porphyry is apparent in the designs for the National Mall
Classic cobblestone roads of Porphyry and granite are a part of European cycling history that continues to the present day.
This comprehensive Urban Design, Visioning, Design Standards document includes hardscape, plant lists, and water features for Public Space.
Pervious Porphyry pavement has a role to play in numerous parking lanes, alleys, driveways, motor courts and walkways in Philadelphia.
Article about porphyry's historic use, discovery, and use as paving by the Romans
The importance of substrate in paving cannot be undervalued. The paving layer is the veneer over the top of the substrate.