Deftly mixing periods and styles, Alan Wanzenberg devises serene, sophisticated spaces accented with impeccable furnishings and art. Place of Inspiration: “Berlin is truly a city for the 21st century.” Key Influence: Wanzenberg says his late partner in business and life, Jed Johnson, “continues to have a major impact on my work.” Up Next: Residences for a new resort community in Costa Rica and the restoration of sculptor Ibram Lassaw’s former Hamptons home. Taghkanic, New York; alanwanzenbergom