Final answer:
Nicola Sabbatini introduced reflective lighting to theater, which was significant in the development of theatrical design and technology.
Step-by-step explanation:
Italian architect Nicola Sabbatini introduced the concept of reflective lighting to theater by holding a polished concave mirror behind a lamp. This innovative approach to lighting was an important development in the evolution of theatrical design and technology. It helped to illuminate the stage in a more effective and dramatic manner, enhancing the audience's viewing experience and setting the stage for future advancements in stage lighting and design.