Since the ’70 Vienna has taken up the political, economic and planning actions heading to make the city the significant European business centre. The mentioned above has been realised by development of the modern workplaces connected with generating, transforming, distributing and commercialising information, it is to say by developing the office and conferencing functions. The first was built the Uno-City, then it was recreated into the multifunctional business plot with the office function as the main, namely the Donau-City. With the business area of more than 11mln squaremetres, Vienna is the biggest centre of this type in the eastern part of the European Union, and within the limits of Donau-City there have been risen many interesting architectural objects. The six of them are presented in the article.

In this paper, structural, electronic, thermal, and thermoelectric properties of Al _0.25B _0.75As alloy, under pressures 0 GPa, 4 GPa and 8 GPa, have been calculated. The value of band gap at present work under 0 GPa, with GGA(PBE) exchange-correlation potential, is very close to other works with TB-mBJ method. This is a result of equal selection of muffin-tin radius spheres that are bigger than usual size for Al and B atoms. The values of band gap decrease by increasing pressure. In thermal properties, phonon contribution of heat capacity at constant volume and Debye temperature have been calculated in the range of 0K to 1000K temperatures and under 0 GPa, 4 GPa and 8 GPa pressures. Thermoelectric properties, under the same pressures and in the range of 100K to 1000K temperatures have been investigated.