I found that this house at the entrance of Guarene was particularly nice.
Actually, Langhe and Roero are not far from Turin (around 50 km) and I feel the many houses of the villages have been bought by citizens of Turin that either live here yearlong and go to Turin to work or come here only for week-ends. This is not only true in Guarene, but I have noticed that for example in Neive.
The address given for the Palace is Via Alessandro Roero, Guarene. However, the palace is taller and wider than the whole village that it dominates completely and you will find it, even if you do not know the address ! Actually, giving an address to such a large structure looks like a joke !
A fortified castle has been standing in this place since the Middle-Ages. In the 18th century, the Marquis of the Roero put it down and built instead the imposing baroque style palace that we can see now. It is one of the best examples of the palaces built by the nobles in the 18th in the "juvarriano" style. It is also one of the best kept. Both the outside and the inside are in perfect condition. As far as I remember, groups can visit it every Sundays at 2PM. We did not try to visit it as we are not castle fans, but it seems that the visit is really worth it.