The neighborhood where we live has a significant diplomatic community, and a number of embassies are located here. Most larger countries' embassies are located downtown or in Zamalek (though Japan's embassy is in Maadi, but not nearby). Some smaller countries are in the neighborhood. I pass by Guatemala and Burkina Faso on occasion. A brand new sign just went up at the apartment building next door; an embassy has taken up residence (presumably in a single apartment). And there is the flag. Any guesses?
The Republic of Macedonia!