Family research · Hub · Phase 1–2 of the world atlas

Flags of Former Yugoslavia

Six countries, each with its own flag lineage from the medieval period to today — and, below, one map that shows how the same territory changed hands across nine centuries, one slider-turn at a time.

Every deep dive is linked below. Start with Croatia if you're following the family line, or drag the map's slider first to see the whole region's story at a glance.

The six lineages

16 flags · c. 925–present Croatia Ragusa, Venetian Dalmatia, the šahovnica, two Yugoslavias, the republic today. 9 flags · c. 700–present Slovenia Carantania, the Duchy of Carniola, a wartime three-way partition, the Alpine republic. 11 flags · c. 1166–present Serbia The Nemanjić kingdom, Dušan's short-lived empire, four Ottoman centuries, the republic today. 9 flags · c. 1154–present Bosnia & Herzegovina The Kotromanić lilies, four Ottoman centuries, and a flag imposed by a Spanish diplomat. 8 flags · c. 1451–present Montenegro The eagle of Zeta, prince-bishops of Cetinje, a kingdom, and a 2006 return to independence. 9 flags · c. 840s–present North Macedonia Dušan's capital at Skopje, the Kruševo Republic's red flag, a flag redesigned by treaty. 11 flags · c. 681–present Bulgaria A pre-heraldic khanate, five Ottoman centuries, a 1878–85 split with Eastern Rumelia, the republic today. 12 flags · c. 1190–present Albania Skanderbeg's own banner, four and a half Ottoman centuries, Hoxha's isolated Communist state, the republic today. 12 flags · c. 1204–present Greece Crusader Frankokratia, four Ottoman centuries, the 1916 National Schism, a colonels' junta, the republic today.

Nine centuries, one map

A real, traced map — actual coastlines and borders, not schematic shapes, now covering the whole Balkan peninsula: the original six former-Yugoslav countries plus Bulgaria, Albania, and Greece. Drag the slider or press play; each snapshot simplifies a messier reality into the dominant power of the moment.

Borders here are data, not decoration. A line between two regions only draws solid when they were actually governed separately. When they weren't — Slovenia and Croatia under the same Habsburg crown for centuries, say — the line dissolves and their names merge into whoever actually ruled them both. Colors blend between eras instead of jump-cutting.

1200

Medieval kingdoms

Real traced borders (simplified). Bulgaria, Albania, and Greece are now tracked as full regions with their own real colors and borders, not just faint context, to complete the Balkan picture — the map now extends well east and south of the original six-country footprint.

Try: drag slowly from 1200 to 1878 and watch the Slovenia–Croatia line stay dissolved the whole way — same crown, no real boundary, the entire time — while Bulgaria and North Macedonia's line dissolves too in 1943, since Bulgaria itself annexed Macedonia rather than a separate occupier doing it. Then jump to 1920: every internal line among the six former-Yugoslav regions disappears at once, while Bulgaria, Albania, and Greece each stay their own separate color the whole time, never part of that kingdom. At 2008, watch all seventeen possible lines snap solid at once — ten fully independent countries, none of them answering to any of the others.

The same story, as a timeline

Maps are bad at showing when; timelines are bad at showing where. This uses real transition years instead of the nine arbitrary snapshots above — one horizontal band per region, colored the same way as the map, so you can trace exactly how long each era actually lasted and compare regions directly (watch Bosnia and Serbia turn Ottoman-red in the same decades).

The same story, nine frames — only the change lights up

Every region keeps its true color, but anything unchanged from the previous frame fades to low opacity; only the region(s) that actually changed hands stay bold with a solid outline. A caption under each frame spells out exactly what flipped. No slider to operate — scan left to right, top to bottom, and watch the map redraw itself like a flipbook.

About this atlas

This started as a family history project: tracing the flags that flew over the lands our ancestors came from, close enough to paint accurately — correct colors, correct proportions, correct dates. Croatia came first; the rest of former Yugoslavia followed because the histories are so tightly interwoven that none of the six really makes sense alone.

Every country page carries its own timeline of flags with paint-ready color specs and a per-era location map. Colors are close historical approximations; pre-19th-century swatches especially are informed reconstructions, not official specifications, and are labeled as such throughout. The regional map above simplifies nine centuries of messy, overlapping, disputed control into nine snapshots — useful for orientation, not a substitute for the detail in each country's own page.

More of the atlas

This hub is one region in a larger set. See the other phases here:

Flags Atlas indexSearch every country and hub Habsburg Lands hubSeven countries, four centuries German Lands hubGermany's own east-west split