The value of a table like this is to be able to see what is going on in many areas simultaneously, so to keep the table to reasonable proportions all events are tabulated in the nearest 5 year cell; actual date (if known) is given in brackets. Innovations and developments in technology are very difficult to date accurately. Unless there is a date in brackets after such an entry, its position in the table should be regarded as approximate, indicating our earliest evidence of such a technology, rather than the date of its invention (which would be earlier).
La mayor parte de las imágenes que aquí verás son las réplicas que nosotros mismos hemos realizado. Todo ha sido fruto de nuestro trabajo para que tú, al igual que nosotros, puedas también saber cómo se escribió nuestra herencia, tu herencia, ese legado que griegos y romanos escribieron y que hoy todos hemos heredado.