St Aubin's Cathedral (1751-1767) is the only cathedral in Belgium built in academic Late Baroque style. It was the only church built in the Low Countries as a cathedral after 1559, when most of the dioceses of the Netherlands were reorganized.
In the interior, there is an ornamented frieze, carved with swags of fruit and flowers between the Corinthian capitals runs in an unbroken band entirely round the church. All colour is avoided, replaced by architectural enrichments and the bas-reliefs in the pendentives of the dome. The interior contains some pieces of art, like paintings by Anthony van Dyck, Jacob Jordaens and Jacques Nicolaï, a Jesuit brother and student of Rubens. The is also an old, romanesque baptismal font.
In the cathedral a marble plaque near the high altar conceals a casket containing the heart of Don Juan of Austria, Habsburg governor of the Spanish Netherlands, who died in 1578; his body lies in the Escorial near Madrid.
Despite being in Belgium, the cathedral design has an Italian influence; it was built to designs of the Ticinese architect Gaetano Matteo Pisoni in 1751 and 1767. A tower of the former Romanesque church dated from the 13th century that stood on the site has survived and is located at the west end of the church.References:
The Palace of the Grand Dukes of Lithuania was built originally in the 15th century for the rulers of the Grand Duchy of Lithuania. The Royal Palace in the Lower Castle evolved over the years and prospered during the 16th and mid-17th centuries. For four centuries the palace was the political, administrative and cultural center of the Grand Duchy of Lithuania.
Soon after the Grand Duchy of Lithuania was incorporated into Tsarist Russia, Tsarist officials ordered the demolition of the remaining sections of the Royal Palace. The Palace was almost completely demolished in 1801, the bricks and stones were sold, and the site was bowered. Only a small portion of the walls up to the second floor survived, that were sold to a Jewish merchant Abraham Schlossberg around 1800 who incorporated them into his residential house. After the 1831 uprising, the czarist government expelled Schlossberg and took over the building as it was building a fortress beside it. Before the Second World War it was the office of the Lithuanian Army, during the World War II it was the office of the German Army, and after World War II it was used by Soviet security structures and later transformed into the Palace of Pioneers. Fragments of Schlossberg's house have become part of the Eastern Wing of the restored Royal Palace.
A new palace has been under construction since 2002 on the site of the original building. The Royal Palace was officially opened during the celebration of the millennium of the name of Lithuania in 2009.