Harry Anderson's group stitched together porphyrin rings in very clever ways to create aromatic molecules with up to 162 pi electrons, which still obey Hückel's rule. Considering that Erich Hückel developed his concept of aromaticity based on benzene with 6 pi electrons, I find this quite mindboggling. And it also looks stunning.
Largest molecular wheel ever made pushes limits of aromaticity rules
Chemistry World, 22.1.2020
Open Access (Chemistry World allow you to read a few articles for free each month, so as long as you haven't used up your quota this one should be free)
Artist's impression.
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