Eiffage Polska Budownictwo SA signed a deal last month to modernise the 33,000-capacity stadium originally built in 1953, ending a search which was in its sixth month.

It is due to host the Opening Ceremony of the European Games on June 21 and the Closing Ceremony on July 2.

Architecturally, the modernisation of the building will focus on the new façade.

It is planned to replace the windows, doors and improve the overall aesthetics, Eiffage revealed, so that the facility will be more impressive from the outside.

The changes also aim to make the stadium energy efficient, it is claimed.

For the heating, ventilation and air conditioning system, it is planned to replace the air handling units located on the facades and to upgrade the ventilation system in the stairwells.

The project also includes a complete upgrade of the fire alarm system at the stadium which is the home ground of Wisła Kraków, who play in Polish football's second division I liga, and is named after former player Henryk Reyman, who scored more than 300 goals for the club in a spell between 1914 and 1933.

The last major upgrade to the stadium was completed in 2011.

As well as the Opening and Closing Ceremonies, the venue is also due to host rugby sevens during the European Games.

"We are proud that the result of our work will once again be part of the Krakow landscape," Marek Kowalik, regional director south of Eiffage Polska, said.

"We would like to thank the city for the trust it has placed in us by entrusting us with this task and we are fully prepared to carry it out.

"Although the project may pose many challenges, we are ready to meet them.

"We will carry out the work according to the 'design and build' system, which allows us to adapt dynamically to changing conditions, both technical and weather-related.

"We are delighted to be able to use our many years of experience to help the city in its preparations for the next European Games, which will be inaugurated on the pitch of the modernised Henryk Reyman Municipal Stadium in just a few months."

Work began on the project last month and there are currently 100 workers on site.

It is due to be completed in May.