Every project on this page is edited and planned by ELLE Decor. We may earn commissions on certain goods you choose to purchase. Whether entering their third decade or celebrating their centennial birthday, these companies have shown that good design is commonplace.

Above, clockwise from left: founders Giuseppina and Angelo Molteni; (from left) Andrea, Giulia, Carlo and Giovanni Molteni; Gio Ponti’s reissued Round D.154.5 chair, 1954; Foster + Partners’ curved table, 2010 years. Founder Angelo and Giuseppina Molteni family tree Carlo Molteni, the founder’s son and current president, paved the way for the third generation of Molteni leadership including Giulia, Giovanni and Andrea.