Pleistocene hunters no relation Thuringia
Early history
The Central Hessian region was inhabited in the Upper Paleolithic. 
Finds of tools in southern Hesse in Rüsselsheim suggest the presence of Pleistocene hunters about 13,000 years ago. A fossil hominid skull that was found in northern Hesse, just outside the village of Rhünda, has been dated at 12,000 years ago.
The Züschen tomb (German: Steinkammergrab von Züschen, sometimes also Lohne-Züschen) is a prehistoric burial monument, located between Lohne and Züschen, near Fritzlar, Hesse, Germany. Classified as a gallery grave or a Hessian-Westphalian stone cist (hessisch-westfälische Steinkiste), it is one of the most important megalithic monuments in Central Europe. Dating to c. 3000 BC, it belongs to the Late Neolithic Wartberg culture.
An early Celtic presence in what is now Hesse is indicated by a mid-5th-century BC La Tène-style burial uncovered at Glauberg. The region was later settled by the Germanic Chatti tribe around the 1st century BC, and the name Hesse is a continuation of that tribal name.
The ancient Romans had a military camp in Dorlar, and in Waldgirmes directly on the eastern outskirts of Wetzlar was a civil settlement under construction. Presumably, the provincial government for the occupied territories of the right bank of Germania was planned at this location. The governor of Germania, at least temporarily, likely had resided here. The settlement appears to have been abandoned by the Romans after the devastating Battle of the Teutoburg Forest failed in the year AD 9. The Chatti were also involved in the Revolt of the Batavi in AD 69.
Hessia, from the early 7th century on, served as a buffer between areas dominated by the Saxons (to the north) and the Franks, who brought the area to the south under their control in the early sixth century and occupied Thuringia (to the east) in 531. Hessia occupies the northwestern part of the modern German state of Hesse; its borders were not clearly delineated. Its geographic center is Fritzlar; it extends in the southeast to Hersfeld on the river Fulda, in the north to past Kassel and up to the rivers Diemel and Weser. To the west, it occupies the valleys of the rivers Eder and Lahn (the latter until it turns south). It measured roughly 90 kilometers north–south, and 80 north-west.The area around Fritzlar shows evidence of significant pagan belief from the 1st century on. Geismar was a particular focus of such activity; it was continuously occupied from the Roman period on, with a settlement from the Roman period, which itself had a predecessor from the 5th century BC. Excavations have produced a horse burial and bronze artifacts. A possible religious cult may have centered on a natural spring in Geismar, called Heilgenbron; the name "Geismar" (possibly "energetic pool") itself may be derived from that spring. 
The village of Maden, Gudensberg, now a part of Gudensberg near Fritzlar and less than ten miles from Geismar, was likely an ancient religious center; the basaltic outcrop of Gudensberg is named after Wodan, and a two-meter tall quartzite megalith called the Wotanstein is at the center of the village.By the mid-7th century, the Franks had established themselves as overlords, which is suggested by archeological evidence of burials, and they built fortifications in various places, including Christenberg. By 690, they took direct control over Hessia, apparently to counteract expansion by the Saxons, who built fortifications in Gaulskopf and Eresburg across the river Diemel, the northern boundary of Hessia. The Büraburg (which already had a Frankish settlement in the sixth century) was one of the places the Franks fortified to resist the Saxon pressure, and according to John-Henry Clay, the Büraburg was "probably the largest man-made construction seen in Hessia for at least seven hundred years". Walls and trenches totaling one kilometer in length were made, and they enclosed "8 hectares of a spur that offered a commanding view over Fritzlar and the densely-populated heart of Hessia".Following Saxon incursions into Chattish territory in the 7th century, two gaue had been established; a Frankish one, comprising an area around Fritzlar and Kassel, and a Saxonian one. In the 9th century, the Saxon Hessengau also came under the rule of the Franconians.Geography
The only state to straddle west and central portions of Germany where the eight ordinal directions (compass points) and the centre is considered, Hesse borders six other states. These are, from north, clockwise: Lower Saxony, Thuringia, Bavaria, Baden-Württemberg, Rhineland-Palatinate, and North Rhine-Westphalia.
The most populous towns and cities of Hesse are in the southwest, the Frankfurt Rhein-Main Region namely Frankfurt am Main, Wiesbaden, Darmstadt, Offenbach, Hanau, Giessen, Wetzlar, and Rüsselsheim am Main.  Outwith, but very near the south-west corner of Hesse are four populous, highly technologised, places: Worms, Ludwigshafen, Mainheim and Heidelberg.  
Other large Hessian towns are Fulda in the east, Kassel and Marburg an der Lahn in the north and Limburg an der Lahn in the west.  All of the "on the river" suffixes are locally and, informally far beyond, omitted of these cities. The plain between the rivers Main, Rhine, and lower Neckar, and the Odenwald ridge of low mountains or very high hills is called the Ried which continues to north, across the Main, as the Wetterau.  Both plains which are quite densely populated also have a substantial built environment such as the country's largest airport, contrasting with the more forested, hillier middle and northern thirds of Hesse.
The longest rivers in Hesse are the Eder and moreover its distributary the Fulda draining most of the north, the Lahn in the centre-west and, as to those navigable by large vessels, the Main and very broad Rhine in the south. The countryside is hilly and the topographical map, inset, names 14 short, low to medium-height mountain ranges including the Rhön, the Westerwald, the Taunus, the Vogelsberg, the Knüll and the Spessart. The notable range forming the southern taper of Hesse (shared with a narrowing of the Ried, the Rhine's eastern plain) and briefly spanning the middle Neckar valley which begins directly east of Heidelburg (thus also in Baden-Württemberg) is the Odenwald.  Forming a mid-eastern tiny projection into mostly Thuringia is the uppermost part of the Ulster, commanding the west valley side of which is the Hessian highest point, Wasserkuppe at 950m above sea level – in the Rhön.
The Rhine forms the long southwest border of Hesse. Two notables oxbow lakes, the Stockstadt-Erfelder Altrhein and Lampertheimer Altrhein are in the south-west fringe.  
Hesse, 42% forest, is by that measure the greenest state in Germany.
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