| King Wladyslaw III (Vladislav Varnenchik) |
9 |
| king-priest |
3 |
| King's Landing |
2 |
| King's Mound |
2 |
| Kingdom of Hungary |
3 |
| Kingdom of Macedon |
14 |
| Kingdom of Pontus |
6 |
| Kingdom of Serbs |
1 |
| Kingdom of the East Franks |
2 |
| Kingdom of Thessalonica (Thessaloniki) |
1 |
| Kireka Monastery |
1 |
| Kiril Arnautski |
1 |
| Kiril Kirilov |
1 |
| Kiril Kotev |
1 |
| Kirklareli |
2 |
| Kirkovo Municipality |
6 |
| Kiten |
2 |
| Kitova Mound |
2 |
| Kiyiköy |
3 |
| Kladovo |
1 |
| Kliment |
1 |
| Klimentina Ivanova |
1 |
| Kliseto |
2 |
| Klisura Monastery “St. Cyril and St. Methodius” |
1 |
| Klisura Museum of History |
2 |
| Klosterneuburg Monaster |
1 |
| knife |
6 |
| knights |
12 |
| Knjazevac |
1 |
| knot of Isis |
1 |
| knucklebones |
1 |
| Knyaginya (Princess) Clementine of Orleans |
1 |
| Knyaz Alexander I Batenberg |
5 |
| Knyaz Boris I |
28 |
| Knyaz Sviatoslav I Igorevich of Kiev |
13 |
| Knyaz Vladimir Rasate |
1 |
| Knyazheski (Princely) Monastery |
3 |
| Knyazheski (Royal) Monastery |
5 |
| Knyazheski Monastery |
3 |
| Knyazhevo |
1 |
| Kocherinovo |
2 |
| Kocherinovo Municipality |
8 |
| Kocho Stoyanov |
1 |
| Kodjadermen – Gumelnița – Karanovo VI |
1 |
| Kodzhadermen Settlement Mound |
1 |
| Köhler sewing machine |
1 |
| Kokalyane |
1 |
| kolibarstvo |
1 |
| Koloto Mound |
2 |
| Kolusha |
2 |
| Kolyo Ficheto |
7 |
| Kolyo Kolev |
1 |
| Komatevo |
1 |
| Komatevsko Shose road |
1 |
| Komnenos Dynasty |
6 |
| Komotini |
2 |
| Kon-Tiki |
1 |
| Konnik |
1 |
| Konstantin Dochev |
9 |
| Konstantin Dragash |
1 |
| Konstantin Georgiev |
3 |
| Konstantin Gospodinov |
3 |
| Konstantin Jirecek |
4 |
| Konstantin Konstantinov |
1 |
| Konstantin Muraviev |
1 |
| Konstantin Totev |
10 |
| Konstantsalieva House |
4 |
| Kopilovtsi |
2 |
| Koprinka |
1 |
| Koprinka Water Reservoir |
7 |
| Koptis |
1 |
| Koshnitsa |
2 |
| Koshov |
1 |
| Kosovo |
1 |
| Kosovo (Asenovgrad Municipality) |
1 |
| Kosta Yankov |
1 |
| Kostadin Kisyov |
29 |
| Kostadin Kostadinov |
15 |
| Kostantsalieva House |
1 |
| Kotel |
2 |
| Kotor |
2 |
| Kovachevets |
1 |
| Kovachevsko Kale |
1 |
| Kovachevsko Kale Fortress |
5 |
| Kovanlaka |
1 |
| Kovil |
1 |
| Kozareva Mogila settlement |
4 |
| Kozarnika Cave |
7 |
| Kozhuh |
2 |
| Kozi Garbini ("Goat Backs") |
1 |
| Kozloduy |
1 |
| Krakra Fortress |
9 |
| Krakra of Pernik |
1 |
| Kralevo |
2 |
| Kralevo Gold Treasure |
2 |
| Kran |
5 |
| Kran Despotate |
1 |
| Kran Fortress |
1 |
| Kran II Tomb |
4 |
| Kranska Hora |
4 |
