罗马帝国

罗 = 夕 + 罒 : Lenny Lemur wanted to catch a few bats with a net hang high across the observatory's kitchen. Instead, two bats catch him in a roll of gauze in a fly-by manoeuvre.

马 = ㇖ + ㇉ + 一 : A beautiful unicorn rides on top of Mahatma Gandhi in the ashram.

帝 = 立 + 冖 + 巾 : Mnemonic symbol: the great emperor Caesar.

Caesar prepared to sauna in the space station's bathroom, and he has his towel already around his neck when he prepares a new aufguss. Just as he wants to lift the vase, the cooking top on top of it lifts itself as Dorothy Gale looks out, laughing at Caesar.

国 = 囗 + 玉 : Mnemonic symbol: a nation's flag. Let's say the Chinese flag.

In the observatory's kitchen (o2) Gitta Giraffe (gu) is practising her ballet performance. She got a whole crate (囗) full of jade bracelets (玉) and flags (国) and fixed one flag to each jade bracelet. This makes a perfect combination for throwing the ring with the flag waving behind it and catching the ring again after a few pirouettes.