Ключевые слова: ancient, antique, astronomy, bronze, century, circle, clock, concept, day, depth, dial, eleven, field, heritage, historic, historical, history, hour, instrument, mathematic, maths, measuring, metal, minute, numbers, numeral, object, old, one, past, period, retro, roman, science, shadow, shallow, solar, stone, sun, sundial, sunlight, sunny, symbol, time, timepiece, traditional, twelve, two, vintage,