Simplify the following text for a Grade 7 native English-speaking person.
Original: While he created one-of-a-kind designs to please some of his titled or wealthy customers , he is best known for preparing a portfolio of designs that were shown on live models at the House of Worth .
Simplified: He created one-of-a-kind designs to please his titled or wealthy customers . More importantly , he prepared designs which were shown on live models at the House of Worth .