• 1866 crimes in Europe‎ (2 C, 1 P)
• 1866 disasters in Europe‎ (2 C, 2 P)
• 1866 elections in Europe‎ (1 C, 7 P)
• 1866 in European sport‎ (5 C)

/

• 1866 disestablishments in Europe‎ (11 C, 8 P)
• 1866 establishments in Europe‎ (23 C, 1 P)

B

• 1866 in Belgium‎ (1 C, 2 P)

C

• 1866 in Croatia‎ (1 C, 1 P)
• 1866 in the Crown Dependencies‎ (1 C)

D

• 1866 in Denmark‎ (3 C, 3 P)

E

• 1866 in England‎ (5 C, 17 P)

F

• 1866 in Finland‎ (1 C, 2 P)
• 1866 in France‎ (4 C, 1 P)

G

• 1866 in the German Confederation‎ (6 C, 18 P)
• 1866 in Greece‎ (1 C, 2 P)

H

• 1866 in Hungary‎ (1 P)

I

• 1866 in Iceland‎ (1 P)
• 1866 in Ireland‎ (2 C, 1 P)
• 1866 in the Isle of Man‎ (1 C)
• 1866 in Italy‎ (4 C, 13 P)

K

• 1866 in the Kingdom of Hanover‎ (1 C)

L

• 1866 in Liechtenstein‎ (1 P)

M

• 1866 in Malta‎ (1 C)

N

• 1866 in the Netherlands‎ (1 C, 1 P)
• 1866 in Norway‎ (2 C, 1 P)

O

• 1866 in the Ottoman Empire‎ (5 C, 4 P)

P

• 1866 in the Papal States‎ (2 C)
• 1866 in Poland‎ (1 C)
• 1866 in Portugal‎ (2 C, 1 P)
• 1866 in Prussia‎ (1 C, 3 P)

R

• 1866 in Romania‎ (2 C, 4 P)
• 1866 in the Russian Empire‎ (4 C, 3 P)

S

• 1866 in Scotland‎ (3 C, 4 P)
• 1866 in Serbia‎ (1 C)
• 1866 in Spain‎ (3 C, 1 P)
• 1866 in Sweden‎ (3 C, 5 P)
• 1866 in Switzerland‎ (1 C, 3 P)

T

• 1866 in the Austrian Empire‎ (5 C, 20 P)
• 1866 in the Kingdom of Saxony‎ (1 C)

U

• 1866 in the United Kingdom‎ (14 C, 8 P)

W

• 1866 in Wales‎ (1 C, 2 P)

0–9

• 1866 in the United Kingdom
• 1866 in Wales

B

• 1866 in Belgium

F

• 1866 in France

G

• 1866 in Germany

I

• 1866 in Iceland
• 1866 in Ireland

P

• 1866 in Portugal

S

• 1866 in Scotland