Complex sentence: The architect of the tower is Professor Christoph Mäckler and the project developer is Tishman Speyer, a US company that previously built the Sony Center in Berlin and the MesseTurm in Frankfurt.
Split into simpler sentences: The architect of the tower is Professor Christoph Mäckler. The project developer is Tishman Speyer, a US firm that previously built the Sony Center in Berlin and the MesseTurm in Frankfurt.