What breed of horse is oldest and purest?

It's impossible to definitively say which horse breed is the "oldest and purest" for a few reasons:

* Ancient Origins: Domestication of horses happened thousands of years ago, and the exact origins of many breeds are shrouded in time and often rely on historical records and genetic analysis.

* Evolution and Interbreeding: Throughout history, horses have been selectively bred and crossbred. This means even breeds considered "ancient" may have undergone changes and intermingling with other breeds.

* "Purest" is subjective: What constitutes a "pure" breed is somewhat subjective. Some might consider a breed with minimal interbreeding as more pure, while others might prioritize traits specific to a particular region or purpose.

However, some breeds are often considered to have ancient roots and have remained relatively stable:

* Arabian: Known for its endurance and distinct head shape, the Arabian is one of the oldest recognized breeds and is considered by many to have played a significant role in the development of other breeds.

* Akhal-Teke: This breed from Turkmenistan is renowned for its metallic coat and stamina, and its lineage traces back thousands of years.

* Turkoman: Another breed originating from Central Asia, the Turkoman is known for its hardiness and strength. It has been prized for centuries for its use in warfare and transportation.

* Icelandic Horse: This versatile breed, native to Iceland, has a distinct gait called the "tölt" and is known for its strong bond with its owners.

Important note: Even these breeds have evolved over time and have seen some interbreeding. There's no single breed that holds the absolute title of "oldest and purest" - the horse breeds we know today are a result of centuries of selective breeding and natural evolution.