Editing Romanesque architecture (section)

===Walls===
The walls of Romanesque buildings are often of massive thickness with few and comparatively small openings. They are often double shells, filled with rubble.

The building material differs greatly across Europe, depending upon the local stone and building traditions. In Italy, Poland, much of Germany and parts of the Netherlands, brick is generally used. Other areas saw extensive use of limestone, granite and flint. The building stone was often used in comparatively small and irregular pieces, bedded in thick mortar. Smooth [[ashlar]] masonry was not a distinguishing feature of the style (especially not in the earlier part of the period), but it did occur, chiefly where easily worked limestone was available.<ref name=RH>Rene Hyughe, ''Larousse Encyclopedia of Byzantine and Medieval Art''</ref>