The Puerta de Alcalá is a Neo-classical monument in the Plaza de la Independencia in Madrid. It is regarded as the first modern post-Roman triumphal archbuilt in Europe, older than the similar monuments Arc de Triomphe in Paris and Brandenburg Gate in Berlin.
Puerta de Alcalá was a gate of the former city walls built by Philip IV. It stands near the city center and several meters away from the main entrance to the Parque del Buen Retiro. The square is bisected by Alcalá Street, although the street does not cross through the monument, and it is the origin of the Alfonso XII, Serrano and Olózaga streets. Its name originates from the old path from Madrid to the nearby town of Alcalá de Henares.
Madrid in the late 18th century still looked like a somewhat drab borough, surrounded by medieval walls. Around the year 1774, king Charles III commissioned Francesco Sabatini to construct a monumental gate in the city wall through which an expanded road to the city of Alcalá was to pass, replacing an older, smaller, gate that stood nearby. It was inaugurated in 1778.
References:Rosenborg Palace was built in the period 1606-34 as Christian IV’s summerhouse just outside the ramparts of Copenhagen. Christian IV was very fond of the palace and often stayed at the castle when he resided in Copenhagen, and it was here that he died in 1648. After his death, the palace passed to his son King Frederik III, who together with his queen, Sophie Amalie, carried out several types of modernisation.
The last king who used the place as a residence was Frederik IV, and around 1720, Rosenborg was abandoned in favor of Frederiksborg Palace.Through the 1700s, considerable art treasures were collected at Rosenborg Castle, among other things items from the estates of deceased royalty and from Christiansborg after the fire there in 1794.
Soon the idea of a museum arose, and that was realised in 1833, which is The Royal Danish Collection’s official year of establishment.