Třinec is one of the most important industrial cities in the Moravian-Silesian Region and the Czech Republic. Its development is due primarily to the steel giant, Třinecké ironworks, that began to smelt iron in the 1st half of the 19th century and therefore, the insignificant village gave rise to the city.
The first mention of the settlement of Třinec dates from 1444, but only in the 1930s did the village become a city. Today, one of the largest Czech hockey teams is based here, there is a top hospital and a museum dedicated to the history of the town and factory.
The development of the industrial center of Těšínska (the Těšin area) is related to natural resources. Wood from the surrounding forests became a source of energy for the production of charcoal for the blast furnaces and heating. Although the soil in the local fields was not sufficiently fertile, the river Olše (the Olza) provided a water supply for the factory. Deposits of iron ore and limestone were also discovered nearby, which, together with a number of residents who wanted a livelihood, led to the arise of a smelter. Gradually, the wood was replaced by coal from nearby mines in the Ostrava and Karvina areas and Třinec was connected to the railway.
In the 1920s, Třinec ironworks was the largest company in the Czech part of Těšin (Cieszyn). Development continued after World War II and there is still a factory here today popularly known as "Werk", which is a major force in regional development.
Třinec is surrounded by mountains, the highest being Javorový (Maple), where you can go by foot or take the cable car. In the 'Werk arena' many sporting and cultural events are held. Singers Ewa Farna and Tomáš Klus also come from this area.