The London Stock Exchange (LSE) is a stock exchange located in the City of London, England. , the Exchange had a market capitalisation of US$6.06 trillion (short scale), making it the third-largest stock exchange in the world by this measurement (the largest in Europe, ahead of Euronext). The Exchange was founded in 1801 and its current premises are situated in Paternoster Square close to St Paul's Cathedral in the City of London. The Exchange is part of the London Stock Exchange Group. 

London Stock Exchange is one of the world’s oldest stock exchanges and can trace its history back more than 300 years. London Stock Exchange Group was created in October 2007 when London Stock Exchange merged with Milan Stock Exchange, Borsa Italiana. 

The Royal Exchange had been founded by English financier Thomas Gresham on the model of the Antwerp Bourse, as a stock exchange. It was opened by Elizabeth I of England in 1571. 

During the 17th century, stockbrokers were not allowed in the Royal Exchange due to their rude manners. They had to operate from other establishments in the vicinity, notably Jonathan's Coffee-House. At that coffee house, a broker named John Casting started listing the prices of a few commodities, exchange rates and certain key provisions such as salt, coal and paper in 1698. Originally, this was not a daily list and was only published a few days of the week.
Where did stockbrokers operate from in the 17th century?
 Jonathan's Coffee-House