The lifts on the old Canal du Centre are a series of four hydraulic boat lifts near the town of La Louvière, classified both as Wallonia"s Major Heritage and as a World Heritage Site. Along a particular 7km stretch of the Canal du Centre, which connects the river basins of the Meuse and the Scheldt, the water level rises by 66.2 metres. To overcome this difference, the 15.4-metre lift at Houdeng-Goegnies was opened in 1888, and the other three lifts, each with a 16.93 metres rise, opened in 1917. These lifts were designed by Edwin Clark of the British company Clark, Stansfield & Clark.
The lifts were part of the inspiration behind the Peterborough and Kirkfield Lift Locks in Canada. In the late 19th century Richard Birdsall Rogers visited the locks as to understand and study possible ideas for a lift lock system.
These industrial monuments were designated by UNESCO as a World Heritage Site in 1998. Of the eight hydraulic lift locks built in the late 19th and early 20th century, the four of the Canal du Centre are the only ones still functioning in their original form.
Since 2002, operation of the lifts has been limited to recreational use. Commercial traffic now bypasses the old lifts and is handled by the enormous Strépy-Thieu boat lift, whose rise of 73m was the highest in the world upon completion.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.