Stage 5-2 the dining room. Pick up the wine bottle and knife from the big dining table. Use the knife on the chicken or turkey to get a note. Observer the note and it says 3113.
Move to the right shelving system. Pick up a wine glass, corkscrew and plate. Combine the corkscrew with the wine bottle to connect them. Then dismantle the corkscrew and wine bottle combo to get just the wine bottle without the cork.
On the left of the screen is a fireplace. Pick up the mace and helmet from the knight statue in the corner. Use the mace on the bottom plant vase to shatter the vase. Use the knights helmet on this broken vase and the broken vase will change the shape of the knights helmet. Place this helmet into the fireplace to see a roman numerals code: I, III IV, II.
Observe the objects you have collected and you will see they have code numbers. The wine glass has 9958. The plate has 1327, the cork has code 6354. If you do the math the code for the box above the fireplace is then 3795 from top to bottom. Inside the box you will find an amulet.
Use the amulet on the door to unlock the main door puzzle. This puzzle has red and blue gems and gemstones on a grid. To solve it we will label the buttons you press as 1 and 2 on the top row and 3 and 4 on the bottom row. The goal is to get a cross of red gems in the middle. 12211111, 22222112, 33344433, 4444444 and finally code 333333111. This will unlock the main door to the Dining room.