This text is for questions 1 to 3.

    The Kasepuhan Keraton (Palace) is located in the sub-district of Lemahwungkuk in the City of Cirebon, built by Prince Mas Mochammad Arifin II in 1529. This is, therefore, the oldest palace in Java with the longest history. All royal families of Cirebon still live on until today, but all are now, of course, subjects of the Republic of Indonesia.   

    Standing on a total land area of 10 hectares, the Kasepuhan Keraton is the largest, most impressive and best kept among the Cirebon palaces, where every niche carries its own historic significance. The inner buildings are all painted white, where the throne room, living rooms of the royal household, and reception areas to meet guests are found. The palace stands on the south side facing the large green square where stands the Sang Cipta Rasa Grand Mosque on the western side.

    Another interesting feature of the palace is the Lawang Sanga building located on its south side, directly on the banks of Krayan River. This is the tax and customs office during the reign of the Cirebon Kingdom. All goods from overseas entering the kingdom must pass Krayan River where the king's officials will levy the necessary customs duty. This building is most significant for the wealth and welfare of the kingdom. 

Adopted from:
https://web.archive.org/web/20180531115600/
https://www.indonesia.travel/gb/en/destinations/ja
va/cirebon/kasepuhan-palace (February 16, 2021)

Which place is used to meet guests?