The Palace of Queluz is a Portuguese 18th-century palace located at Queluz in the Lisbon District. One of the last great Rococo buildings to be designed in Europe, the palace was conceived as a summer retreat for Dom Pedro of Braganza, later to become husband and then king consort to his own niece, Queen Maria I. It served as a discreet place of incarceration for Queen Maria as her descent into madness continued in the years following Dom Pedro's death in 1786. Following the destruction by fire of the Ajuda Palace in 1794, Queluz Palace became the official residence of the Portuguese prince regent, John VI, and his family and remained so until the Royal Family fled to the Portuguese colony of Brazil in 1807 following the French invasion of Portugal.
Work on the palace began in 1747 under the architect Mateus Vicente de Oliveira. Despite being far smaller, the palace is often referred to as the Portuguese Versailles. From 1826, the palace slowly fell from favour with the Portuguese sovereigns. In 1908, it became the property of the state. Following a serious fire in 1934, which gutted the interior, the palace was extensively restored, and today is open to the public as a major tourist attraction.
One wing of the palace, the Pavilion of Dona Maria, built between 1785 and 1792 by the architect Manuel Caetano de Sousa, is now a guest house allocated to foreign heads of state visiting Portugal.
References:The Walls of Constantinople are a series of defensive stone walls that have surrounded and protected the city of Constantinople (today Istanbul) since its founding as the new capital of the Roman Empire by Constantine the Great. With numerous additions and modifications during their history, they were the last great fortification system of antiquity, and one of the most complex and elaborate systems ever built. They were also the largest and strongest fortification in both the ancient and medieval world.
Initially built by Constantine the Great, the walls surrounded the new city on all sides, protecting it against attack from both sea and land. As the city grew, the famous double line of the Theodosian Walls was built in the 5th century. Although the other sections of the walls were less elaborate, they were, when well-manned, almost impregnable for any medieval besieger.