Batman #60 (1950)

In Batman #60, we see Bruce Wayne flexing his philanthropic muscle by spearheading the construction of a brand-new museum - with each floor representing a different age in history. But not everyone is happy about the project, as one man who had rented a shop in the area for years complains about the construction. Mysteriously, after the museum is built, criminals start escaping into it - and it turns out that the shop had smuggling tunnels under it all along! Meanwhile, in a humorous subplot involving a masquerade ball, Bruce finds himself dressed as Batman and unwittingly inspires a crook to enlist his help as a scare tactic to intimidate other crooks. All in all, Batman #60 is a rollicking good time with a dash of mystery, intrigue, and levity thrown in for good measure.