When the city was reunited in 1990, there was broad consensus that the Pariser Platz should be made into a fine urban space again. The embassies would move back, the hotel and arts academy would be reinstated, and prestigious firms would be encouraged to build round the square. Under the rules of reconstruction, eaves heights had to be 22 meters, and buildings had to have a proper termination against the sky. Stone cladding was to be used as far as possible. Interpretations of these constraints, however, have varied to a great extent.