Situated on one of the most beautiful blocks in Rittenhouse Square, 2106 Spruce Street is a rare Frank Furness designed masterpiece that exemplifies the elegance, artistry, and enduring craftsmanship of 19th-century Philadelphia architecture. Circa 1871, this stately 22 ft wide by 150 ft deep, 6-bedroom, 5.5-bathroom residence spans four floors above ground plus a finished lower level, offering over 5,000 square feet of refined living space with an elevator and large two-car garage with ability to park 4 cars. Behind the ornate stone facade and marble stoop, double wooden doors open to a grand vestibule and entry hall where 14-foot ceilings, intricate crown molding, original hardwood floors, and signature Furness arches showcase timeless craftsmanship. The light-filled living room is anchored by oversized bay windows. Down the hall you'll find the chef's kitchen equipped with stainless steel countertops, Sub-Zero refrigeration, Dacor range with Broan hood, double ovens, and a center island, along with a dining nook, powder room, elevator access, and hallway storage. Beyond lies a formal dining room framed by windows on two sides with recessed lighting and access to a rear deck overlooking an expansive slate patio oasis and rare two-car garage with access from Cypress street. Ascending the original staircase, the second floor hosts the primary suite, an elegant retreat with windows on two exposures, and a spa-like bath with dual vanities, a mirrored wall, private water closet, and oversized glass shower with a built-in bench. A large walk-in closet with lockable drawers and custom millwork completes the primary. The front bedroom on this level features grand French doors beneath a circular transom window, built-in shelving, and classic bay windows that flood the room with light. The third floor offers two additional bedrooms, each with bay windows, generous closets, and en-suite baths. The rear bedroom features light from two exposures, double closets, and a fully tiled bath with a linen closet and subway-tile surround. The front bedroom includes recessed lighting, a cedar closet, and a vintage bath with an enclosed tub/shower combination. The fourth floor adds two more bright and generously sized bedrooms, one with large industrial-style windows and built-in shelving, plus a full hallway bath with storage vanity and tub/shower combo. The finished lower level provides a private guest or au pair suite, complete with its own kitchenette, bathroom, bedroom, laundry area, and separate rear access, along with abundant storage. Blending historic Frank Furness architecture, grand proportions, and modern comfort, 2106 Spruce Street is a true Rittenhouse Square treasure, a timeless residence masterfully preserved and thoughtfully updated, offering elegant living just steps from the city's premier dining, shopping, and cultural landmarks.