The rotunda of St. Martin is the largest and oldest preserved rotunda in Prague. It was built in the second half of the 11th century. It has escaped demolition several times in its history. During the Thirty Years’ War it was used as a gunpowder store. The cannonball embedded in the façade to the right of the window is a reminder of the Prussian rampage in 1757. The rotunda is now used for religious purposes by the Vyšehrad ecclesiastical chapter.References:
The trulli, typical limestone dwellings of Alberobello in the southern Italian region of Puglia, are remarkable examples of corbelled dry-stone construction, a prehistoric building technique still in use in this region. These structures, dating from as early as the mid-14th century, characteristically feature pyramidal, domed, or conical roofs built up of corbelled limestone slabs. Although rural trulli can be found all along the Itria Valley, their highest concentration and best preserved examples of this architectural form are in the town of Alberobello, where there are over 1500 structures in the quarters of Rione Monti and Aja Piccola.
The property comprises six land parcels extending over an area of 11 hectares. The land parcels comprise two districts of the city (quarters or Rione Monti with 1,030 trulli; Rione Aia Piccola with 590 trulli) and four specific locations.
Trulli (singular, trullo) are traditional dry stone huts with a corbelled roof.