Calcium oxide15 is known as lime1116 and is one of the top 10 chemicals1217 produced annually by thermal decomposition of limestone. The thermal decomposition of calcium carbonate to lime18 is one of the oldest chemical reactions known. For several thousand years, lime has been used in mortar (a paste of lime, sand and water) to cement stones to one another in buildings, walls and roads. The setting of mortar involves several chemical reactions.
World Synagogues: Table of Contents | Australia | Canada. Click Left/Right to Scroll, Click the Caption to View the Individual Image. Ahavath Beth Israel Synagogue in Boise, Idaho. This is the oldest Synagogue building still in use West of the Mississippi River. Touro Synagogue - Newport, Rhode Island. Kahal Kadosh Beth Elohim Synagogue - Charleston, SC.
Congregation Shearith Israel, (founded 1655) New York, 1897 building. The designation of the oldest synagogue in the United States requires careful use of definitions, and must be divided into two parts, the oldest in the sense of oldest surviving building, and the oldest in the sense of oldest congregation.