1158

1158 is the natural number that follows 1157 and precedes 1159. It is even and composite, with prime factorization 2 × 3 × 193. The sum of its digits is 15, confirming divisibility by 3. In Roman numerals it is written MCLVIII, and in hexadecimal it is 0x486. In binary it equals 10010000110.

1158 also designates a calendar year in the Julian-era Common Era. In the Julian calendar used during that period, 1158 was not a leap year. The year sits in the middle of the 12th century, a time characterized by the growth of towns and universities in Europe, ongoing Crusades, and the gradual centralization of monarchies.

For the historical record, no single event universally identified as defining 1158 exists in broad overviews; instead, the year is understood within the broader social, political, and religious currents of the High Middle Ages. Regions across Europe, Asia, and the Islamic world experienced developments typical of the era, including feudal governance, scholastic thinking, and cross-cultural contact through trade and pilgrimage.

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