After the Marzpanate period (428636), Armenia emerged as the Emirate of Armenia, an autonomous principality within the Arabic Empire, reuniting Armenian lands previously taken by the Byzantine Empire as well. The principality was ruled by the Prince of Armenia, and recognized by the Caliph and the Byzantine Emperor. It was part of the administrative division/emirate Arminiya created by the Arabs, which also included parts of Georgia and Caucasian Albania, and had its center in the Armenian city, Dvin. The Principality of Armenia lasted until 884, when it regained its independence from the weakened Arab Empire under King Ashot I Bagratuni.
Where was the Principality of Armenia centered?
Dvin

The city has an average elevation of 43 metres (141 ft). Its highest elevations are two hills: the Cerro de Montevideo and the Cerro de la Victoria, with the highest point, the peak of Cerro de Montevideo, crowned by a fortress, the Fortaleza del Cerro at a height of 134 metres (440 ft). Closest cities by road are Las Piedras to the north and the so-called Ciudad de la Costa (a conglomeration of coastal towns) to the east, both in the range of 20 to 25 kilometres (16 mi) from the city center. The approximate distances to the neighbouring department capitals by road are, 90 kilometres (56 mi) to San Jose de Mayo (San Jose Department) and 46 kilometres (29 mi) to Canelones (Canelones Department).
How far is to the neighboring capitol of Canelones?
46 kilometres

A zygote initially develops into a hollow sphere, called a blastula, which undergoes rearrangement and differentiation. In sponges, blastula larvae swim to a new location and develop into a new sponge. In most other groups, the blastula undergoes more complicated rearrangement. It first invaginates to form a gastrula with a digestive chamber, and two separate germ layers an external ectoderm and an internal endoderm. In most cases, a mesoderm also develops between them. These germ layers then differentiate to form tissues and organs.
In sponges, how do blastula develop into a new sponge?
swim to a new location