QUADRILATERAL  , in See also:

• GEOMETRY

geometry, a figure enclosed by four straight lines . It is also a military See also:

• TERM

term applied to a See also:

• COMBINATION (Lat. combinare, to combine)

combination of four fortresses mutually supporting one another . The fortresses of See also:

• NAMUR
• NAMUR (Flemish, Namen)

Namur, See also:

• LIEGE
• LIEGE (Walloon, Lige, Flemish, Luik, Ger. Lilltich)

Liege, See also:

• MAASTRICHT, or MAESTRICI3T

Maastricht, and See also:

• LOUVAIN (Flem. Leuven)

Louvain, and also those of See also:

• SILISTRIA (Bulgarian Silistra)

Silistria, See also:

• RUSTCHUK (Bulg. Russe); the capital of the department of Rustchuk, Bulgaria, on the right bank of the Danube, where it receives the E. Lem. Pop. (r906) 33

Rustchuk, See also:

• SHUMLA (Bulgarian Shumen, Turkish Shumna)

Shumla, and See also:

• VARNA

Varna, were so called . But the most famous quadrilateral was that of the four fortified towns of See also:

• NORTH
• NORTH, BARONS
• NORTH, MARIANNE (1830—1890)
• NORTH, ROGER (1653-1734)
• NORTH, SIR THOMAS (1535?-16o1?)

north See also:

• ITALY
• ITALY (Italia)

Italy—See also:

• MANTUA (Ital. Mantova)

Mantua, Peschiera, See also:

• VERONA
• VERONA, CONGRESS OF

Verona, and See also:

• LEGNAGO

Legnago, A the two former of which are situated on the Mincio and the two latter on the See also:

• ADIGE (Ger. Etsch, anc. Athesis)

Adige . The real value of the quadrilateral, which gave See also:

• AUSTRIA
• AUSTRIA, LOWER (Ger. Niederosterreich or Osterreich unter der Enns, " Austria below the river Enns ")
• AUSTRIA, UPPER (Ger. Oberosterreich or Osterreich ob der Enns, " Austria above the river Enns ")

Austria such a See also:

• FIRM

firm hold on See also:

• LOMBARDY

Lombardy, See also:

• LAY

lay in the See also:

• GREAT

great natural strength of Mantua and in the readiness with which troops and supplies could be poured into Verona from the north .