it, tree, dove symbolising the Holy Spirit, and crescent with a cross) were painted only in the late twentieth century and the early 2000s when the roof cones were renovated. The quaint symbols that grace the trullo-like cones of bungalows at the Hotel dei Trulli in Alberobello first appeared in the late 1950s, when the hotel resort was built. Interiors The vast majority of trulli have one room under each conical roof, with additional living spaces in arched alcoves. Children would sleep in alcoves made in the wall with curtains hung to separate them from the central room. A multi-room trullo house has many cones, each representing a separate room. Along with its exterior wall, a trullo's interior room and vault intrados often were rendered with lime plaster and whitewashed for protection against drafts. The trulli used as dwellings all have an open fireplace complete with a flue (hidden in the masonry) and a stone-built chimney stack (rising high above the roof). Because of their design, trulli are difficult to heat: the walls are very thick and warm air will rise up the interior cone. An alternative heating solution was to use a central brasero with embers in it (a specimen may be seen in Alberobello's Museo del Territorio). The thick stone walls and dome of the trullo that cool pleasantly during the summer, tend to become unpleasantly cold during the winter months, condensing the moisture given off by cooking and breathing, making it difficult to feel warm even in front of the fire. The inhabitants simply leave the doors open during the day to keep the interior dry, and live more outdoors than in. In trulli that were used as stables, the troughs the animals fed from may still be seen. Windows Owing to the concentration of houses, trulli have few openings except for their doorway and a small aperture provided in the roof cone for ventilation, this coupled with the extremely high thermal inertia makes them warmer in winter and cooler in the summer. On the other hand trulli can be quite dark inside. Façades Some trullo houses have had their perimeter walls raised substantially so that their cones may be hidden from view, making the buildings resemble ordinary houses. A number of conical roofs have a truncated top with a round hole in it covered by a movable circular slab. Access to the hole is by an