The Historic Site of Lyons was designated a UNESCO World Heritage Site in 1998. The long history of Lyons, which was founded by the Romans in the 1st century B.C. as the capital of the Three Gauls and has continued to play a major role in Europe's political, cultural and economic development ever since, is vividly illustrated by its urban fabric and the many fine historic buildings from all periods.
The specific regions composing the Historic Site include the Roman district and Fourvière, the Renaissance district (Vieux Lyon), the silk district (slopes of Croix-Rousse), and the Presqu'île, which features architecture from the 12th century to modern times. Both Vieux Lyon and the slopes of Croix-Rousse are known for their narrow passageways that pass through buildings and link streets on either side. The first examples of traboules are thought to have been built in Lyon in the 4th century.References:
The Kalozha church of Saints Boris and Gleb is the oldest extant structure in Hrodna. It is the only surviving monument of ancient Black Ruthenian architecture, distinguished from other Orthodox churches by prolific use of polychrome faceted stones of blue, green or red tint which could be arranged to form crosses or other figures on the wall.
The church is a cross-domed building supported by six circular pillars. The outside is articulated with projecting pilasters, which have rounded corners, as does the building itself. The ante-nave contains the choir loft, accessed by a narrow gradatory in the western wall. Two other stairs were discovered in the walls of the side apses; their purpose is not clear. The floor is lined with ceramic tiles forming decorative patterns. The interior was lined with innumerable built-in pitchers, which usually serve in Eastern Orthodox churches as resonators but in this case were scored to produce decorative effects. For this reason, the central nave has never been painted.
The church was built before 1183 and survived intact, depicted in the 1840s by Michał Kulesza, until 1853, when the south wall collapsed, due to its perilous location on the high bank of the Neman. During restoration works, some fragments of 12th-century frescoes were discovered in the apses. Remains of four other churches in the same style, decorated with pitchers and coloured stones instead of frescoes, were discovered in Hrodna and Vaŭkavysk. They all date back to the turn of the 13th century, as do remains of the first stone palace in the Old Hrodna Castle.
In 2004, the church was included in the Tentative List of UNESCO"s World Heritage Sites.