Completely renovated period building in the historic center, for sale in Sarteano, Siena. Nestled in the heart of the authentic medieval village of Sarteano, between the renowned landscapes of the Val d'Orcia and the rolling hills of the Valdichiana, stands this prestigious 14th-century townhouse palazzo. The birthplace of Pope Pius III, the property announces itself in all its historical importance with a splendid sculpted travertine portal, meticulously adorned with floral motifs and the coats of arms of the Todeschini-Piccolomini family, anticipating the absolute elegance of the interiors. Located a few steps from the main square, the building blends harmoniously into the historic center while offering an unexpected level of privacy, essential for a residence of such prestige. Completely and expertly restored in 2021, the palazzo is spread over four levels for a total area of 387 sq mt/ 4,165 sq ft. The street-level entrance welcomes guests into an elegant reception area. The interior spaces represent a masterpiece of interior design: refined antique furnishings and collections of rare books converse with contemporary art pieces, creating an enveloping and sophisticated atmosphere. Descending into the ancient cellars, you will find a fascinating living and relaxation area, made unique by a striking glass floor that allows you to admire an underground cave, once a secret passage to the village's ancient castle. The two upper floors of the palazzo are entirely dedicated to rest and wellness, hosting three large, luxurious, soundproofed, and air-conditioned suites. Every room is curated in the utmost detail and enriched with fireplaces, balconies, and en-suite bathrooms designed as true personal spas, complete with freestanding bathtubs and sensory showers with chromotherapy. Currently managed as a boutique hotel with a luxury positioning validated on the international market, this property represents a rare investment opportunity. The versatility of the spaces and the impeccable state of maintenance make it the ideal choice both for those who wish to develop a high-profile hospitality business focusing on "tailor-made" experiences, and for those seeking a sumptuous private representative residence in the heart of the most authentic Tuscany.