Seneca sandstone can also be found in the Capitol flooring and door frames. Marble eventually surpassed sandstone as the most common construction material in Washington. The earliest marble originated from a stratum of stone known as Cockeysville Marble, which was quarried in the Piedmont province near Cockeysville and Texas, Maryland, just north of Baltimore. This type of marble is light red with white streaks and has been used for public buildings throughout North America.
The first official use of the term "Capitol Dome" was in 1872 when Congress authorized the building of an extension to the Capitol using a design by Thomas Jefferson Davis (1807-1891). Known as the "Temporary Dome," this structure was built of wood and covered with canvas. It was destroyed by fire in 1895. The present Capitol Dome was completed in 1897 at a cost of $1.5 million ($20 million in today's dollars). It is made of iron and glass, with a gold leaf interior. The dome is actually two concentric spheres connected by a central tower, with the outer sphere being larger than the inner one.
The outer sphere is about 112 feet in diameter and contains the main chamber where members of Congress meet to conduct business. There are five doors on the outside of the dome that open onto balconies or staircases leading to rooms where committees hold hearings or vote on legislation. The only entrance into the inner sphere is through a large window located in the center of the top floor.
Washington Memorial When work on the Monument started in 1848, marble had displaced sandstone as Washington's chosen building stone. Workers raised the monument to a height of 152 feet in the first six years, utilizing marble from a quarry just north of Baltimore near Texas, MD. The original design called for a tower 300 feet high, but financial difficulties caused by the Mexican-American War forced Congress to scale back the project. Work on the statue and other decorations was completed by 1855.
The original plan was to use granite for the base and the shaft, but when local sources proved insufficiently hard, white marble from Italy was substituted. The total cost of the monument, including land, was $150,000 ($1.5 million in today's dollars).
It is estimated that there are fewer than five tons of rock in the entire structure. That's less than one ton per foot, or about the weight of a small child. The largest single piece is the head of a man dating from the early days of construction; it weighs about 20 pounds. The original inscription on his mouth reads "1848."
In 1920, the United States government authorized the replacement of the original sculpture with one of bronze designed by Frederick Hart. The new sculpture was to be the work of Henry Hering, who also designed the Lincoln Memorial.
Between 1848 and 1884, marble was used to construct the Washington Monument. The structure's initial construction used marble from a quarry in Texas, Maryland. Due to a shortage of money, the project was then postponed for approximately 30 years. When construction finally resumed in 1881, another source of marble was needed. This time it came from Canada.
The original idea to build the Washington Monument came from President George Washington. He wanted to create a monument to honor all those who had died in wars against Britain and France. The president's wish was given form by Thomas Jefferson, who designed the monument and ordered its construction.
Marble is a natural stone made up of varying amounts of limestone, clay, sand, and water. It can be white, brown, black, or gray. The word "marble" comes from the Latin word mare, which means "sea."
The capital city of Quebec is one of the largest producers of marble in North America. One out of every five blocks of marble used in American building projects comes from there. In addition, several other states produce marble too. For example, Alabama is the second largest producer of marble in the United States after Quebec. Other states including Florida, Illinois, Indiana, and Nevada also produce marble.