On the first floor there are private royal apartments, chambers for court members and guest rooms.
Four chambers located to the south of the Envoys’ Stairs were designated for the King’s guests. In this part of the palace there are original larch wood ceilings, and also original painted wall friezes in two of the rooms. In terms of architecture especially noteworthy are the Gothic and Renaissance portals – the artwork of Maestro Benedict. The Renaissance furnishing includes northern European and Italian artwork, including the tapestries with grotesque, landscape and animal themes from the collection of Sigismund Augustus. The last two rooms boast Italian paintings from the old collection of the Lanckoroński family. Over sixty paintings from this collection form a studiolo in one of the rooms in Jordanka, the Gothic tower.
In the north-east corner of the castle, with its Gothic rooms, there is the charming and mysterious Hen’s Foot Tower. In Łokietek’s Tower there is Sigismund the Old’s bedroom, and in Sigismund III’s Tower there is an office with rich stucco decoration from around 1600. In the interwar period this section of the castle served as a formal apartment of Polish President Ignacy Mościcki, along with the remaining bedroom in the Danish Tower. In the northern wing of the palace there are two rooms with objects from the reign of the Wettin dynasty in Poland. Among them is an interesting collection of Meissen porcelain. The last two rooms, one of which is the formal Column Room, are furnished in the Classicistic style.