Trinec is a statutory metropolis in Frydek-Místek District, Moravian-Silesian Region of the Czech Republic. It lies at the Olza River, inside the historical area of Cieszyn Silesia. The town has 37,405 population as of 2009, in 2001, 17.7per cent of the population were Poles. The city is notable for its metal plant, the Trinec Iron and Steel Works, biggest one in the Czech Republic, which still has a first-rate impact in town, on its character, demographics and air pollutants. Trinec is also an crucial cultural middle of the Polish minority in Zaolzie.
The village of Trinec changed into based inside the 14th century. The village was first referred to in 1461 whilst the man or woman z Trencze is attested. Politically the village belonged then to the Duchy of Teschen, a rate of the Kingdom of Bohemia, which after 1526 became part of the Habsburg Monarchy. The majority of the populace labored in agriculture. The area become, however, rich in limestone, iron ore and clay. The place also provided a large enough paintings force, so it became decided to build an iron works. In 1836 the construction of the first metallurgical furnace had begun. The iron mill started out operation in 1839, becoming the biggest one in the entire Cieszyn Silesia.