When Los Angeles–based designer Clare Vivier began decorating the 19th-century house she'd bought in her husband's hometown of Saint-Calais, in France's Loire Valley, she had a particular aesthetic in mind. “I love color and patterns but wanted something peaceful, so the intention was to create a dialogue between those two things,” she says. She wanted the house to have a blend of contemporary pieces, antiques, and textiles from heritage maisons to create a space that, much like her namesake handbag and fashion label, channeled both California fun and French sophistication. She also knew that she wanted her longtime friend Kate Berry, a designer and creative director, to help her make it happen.