Palaces, convents and castles
Europe is generous with buildings that became hotels. The Parador de Granada occupies a former convent inside the grounds of the Alhambra, so you sleep within the monument you came to see. Palácio Belmonte in Lisbon's Alfama district is a restored palace with a long history above the river.
Hotel Danieli in Venice is a Gothic palace on the Riva degli Schiavoni, a short walk from St Mark's Square. Ashford Castle, on the shore of Lough Corrib in County Mayo, has origins in the 13th century and grounds to match.
In every case the building is the attraction. We look for places that treat it with respect, which means good restoration, honest descriptions of the rooms, and staff who know the history.

Small rooms, big personality, and what to verify
Boutique hotels are usually small and often owner-run, with a point of view in every detail: a library, a courtyard, a bar that locals use. The trade-off is that rooms differ. The cheapest category may face a wall, and the best may be on a different floor altogether.
Old buildings behave differently. Floors slope, walls are thin, lifts are small or absent, and heating or air conditioning can be less powerful than in a new tower. Heritage protection often limits what an owner can change, which is part of the charm and part of the compromise.
Look at photographs of the exact room type, ask about stairs and light, and tell a small reception your arrival time, since many have no desk staff late at night. A few honest questions before booking turn surprises into pleasures.

