古墓

古 = 十 + 口 : Mnemonic symbol: at least on German maps, this character actually resembles a cloister.

Oh no! Gitta Giraffe (gu) found that the golden cross (十) broke off of the cloister (古) in the space station's living room (Ø3)! She skewers a mandarin (口) on top of the cloister so that she can skewer the broken off cross back on to fix it.

墓 = 土 + 莫 : After Mozart (莫) died, Malte Monkey (mu) built him a grave (墓) in the space station's bathroom (Ø4) out of clay (土). He even added a very fitting epitaph (墓).