Admittance into the crypt is also obtained through a door cut in the face of the rock, but this was made in 1793 when the soil and the bones of the old canons of the Church of the Three Kings were required for saltpetre to make gunpowder for the armies of the Republic. Over the door is a mask carved in the stone and a little window; above the monolithic church, standing on the platform of rock, is the exquisite flamboyant spire, not communicating with the church beneath, also a modern _salle de danse_. Another subterranean church as interesting but not as well preserved is that of Aubeterre in Charente, on the Dronne. By the valley of the Dronne all movement of troops from the Limousin and Perigord into the Saintonge took place, and the rock of Aubeterre was considered of so great military importance that a strong castle was constructed on the summit, and its possession was contested repeatedly during the Hundred Years' War and the wars of religion. Its position was peculiar in this also, that it was in the seneschauté of the Angoumois, in the diocese of Périgueux, and for the purpose of taxation in the Limousin. [ILLUSTRATION: ROCAMADOUR. A cluster of chapels, some excavated in the rock. Zacchæus is erroneously supposed to have lived and died in one of them. A famous place of pilgrimage.] The town is built in the form of an amphitheatre on a chalk hill that commands the Dronne. The hill is precipitous in parts, and is everywhere so steep that the roofs of the houses are below the gardens of those above them, and the saying there is, "Mind that your cattle be not found in your neighbour's stable by tumbling through the roof." The castle occupied a height cut off from the town by a deep cleft, that has its sides pierced with caverns, and its store chambers and cellars are dug out of the rock. But the most curious feature of Aubeterre is the monolithic church of S. John beneath the castle. The doorway admitting into it is on the level of the street, and gives access to a charnel-house with what would be termed _arcosolia_ in the catacombs, on each side, and the floor is humpy with graves. This is 70 feet long by 16 feet wide. On the right hand it gives admission through a doorway cut in the rock to the church itself, consisting of a nave and side aisle divided from it by massive monolithic piers, very much decayed at the top. It is lighted by three round-headed windows like a clerestory without glass. At the further end is an arch admitting to an apse, in the midst of which is an octagonal monolithic tomb of Renaissance style, with columns at the angles, and surmounted by the statue of Francois d'Esparbes de Lussac, Marshal of Aubeterre, and the much mutilated figure of his wife in Carrara marble. A gallery excavated in the rock above the arch into the apse is continued the whole length of the aisle, and turns to admit into the seigneural gallery or pew high up over the entrance whence he and his family could hear Divine Service.