BTHL
Classic Rock Face Block
Manufacturer of historic concrete rock face block. Also commonly known as rusticated concrete block.
Building Technology Heritage Library: Architectural Sheet Metal
Ornamental metals were used in several forms, but stamped sheet metal was a popular material for architectural exteriors and interiors from the 1870s through the 1920s.
Building Technology Heritage Library: Builders’ Hardware
The Building Technology Heritage Library is an open a door to Hardware History.
Building Technology Heritage Library: Ornament
The APT Building Technology Heritage Library has a visual cornucopia of documents that tell the story or architectural ornament.
