1346	Kralodvorske zelezarny Inc. belongs to the oldest metallurgical companies on the territory of Czech lands. It links to the hundred-year tradition of the region, supported by local voluminous diggings of raw materials and wood and water sufficiency. Although the location seems like an age-old advantage, it still holds true today. The old merchant route from Prague, via Pilsen, to Bavaria has transformed into the D5 motorway. The first ironmongers were operating in the place of the current factory already in 13th century. A arge metallurgical plant was established in 1346 by the Czech King and Holy Roman Emperor Caesar Charles IV, by whom the foundry was probably afterwards called - Charles' foundry. Some years earlier, the Popovic foundry was established.
1595	As time went by, foundries were often changing their owners or tenants. In 1586, the famous aristocrat family of Lobkovic bought the equity and consequently brought the entrepreneurial spirit into the steel-making industry of the region. The family of Lobkovic also called the knight Henry Caspar from Sarth, a reputable French professional and entrepreneur, who launched the production of ammunition there and mainly built the first blast furnace in the Czech Republic.
1860	At the end of 16th century, Charles' foundry came under the management of the Royal chamber manor. The decisive stage of the foundry development began in 1860, when the ownership changed over to the Füstenberg family. After twenty years, the last charcoal furnace was demolished and ore was started smelt using coke. Also extensive reconstruction begun - new modern furnaces were built, iron-foundries with abyssal tube casting, pattern-shops, locksmith workshops with lathes, smithy and steam superchargers, a funicular for transportation of limestone form a nearby quarry, etc.
1880	The foundry was sold to Austrian Real Credit Bank in 1880, which in order to manage all metallurgical plants established the Czech montan company. Since that time, the name Kralodvorske zelezarny has begun to be used. Technical development of the plant continued by electrification, the building of fifteen-ton Siemens-Martin furnaces, Thomas steel-works, two other blast furnaces, and also an hotel and the hospital. During the last thirty years of the 19th century, Kralodvorske zelezarny belonged to the high-styled plants in Austria-Hungary. It became a place of meetings of the most significant authorities and of many technical inventions.
1909	Future development continued also at the beginning of 20th century. By 1905 the thin plate rolling mill was finished and the production of transformer and dynamo plates began, the present head office building was, along with water-supply, another flats for employees etc. Also distribution of iron castings was extended including the art type. A considerable turning-point occurred in 1909 when the Czech montan company perished and the new owner became the Prague Iron Corporation.
1938	Development stopped for number of years due to World War I. Reconstruction began in the between-war period. It is important to mention the launching of band production in cold rolling mill in 1938.
1953 1963 1968 1969 1985	All of the companies possessed by Prague Iron Corporation were, together with Kralodvorske zelezarny, nationalised after World War II. A galvanised metal-coated strips plant, located in Velky Senov, Ness of Sluknov, joined the organisation structure of Kralodvorske zelezarny. In 1953 a spun casting foundry was placed in service, in 1963 production began in the new casting foundry, and in 1968 began the production of continuos casting of cast-iron profiles. In the next year the cold rolling mill for stainless steel strips was put into operation, and in the year 1985 the cold rolling mill for low-carbon steel strips. The traditional production range - pig-iron and hot rolled sheets - was stopped in the 1980s, gradually restrained and finally in 1994 ended also tube program. It is also appropriate to mention here the contribution of Kralodvorske zelezarny to the other non-production objects in the region of Kraluv Dvur and Beroun - the building of houses, a sport stadium, tennis courts, swimming-pool, summer resorts etc.
1989 1994	The latest page of history began in 1989 and 1994 when the state-owned enterprise Kralodvorske zelezarny was transformed into a corporation. Inner transformation into a holding type was also finished incorporating: CONTIPROFILE, Ltd., Valcovna za studena Ltd., Kralodvorske zelezarny Slevarna Ltd., Kralodvorske zelezarny ENERGO Ltd., Kralodvorske zelezarny MECHANIKA Ltd., Zelezarny Velky Senov Ltd. The group was recently extended by subsidiaries: Kralodvorske zelezarny Sluzby Ltd., SEFO Ltd. and Kerval Ltd.