Gerd Lange, a 20th century furniture designer, often pushed these limits by designing furniture that was new and modern but still appealing for people to sit on. Architect Frank Ghery is another example of this type of designer. His works are extraordinary and shocking but as an architect he is still subject to basic architecture principles of durability, utility and comfort. Designers must often pose themselves the question: How much excess is too much excess and at what point does focusing too much on functionality become boring and overdone?