My dear Margret...
I have responded below in a facetious manner.
Now I would like to respond to your question more seriously.
Others have already responded that the architectural tradition
exemplified by Stonehenge (in its four stages of development) is
universally recognized as one of the early great works of architecture.
While I am not a historian, I have taught and studied architectural
history and I believe that it is roughly contemporary with the Middle
Kingdom of Egypt. I think that counts as architecture.
Others have also pointed out that...perhaps....the earliest "formal"
examples of architecture in the area known as "England" are those built
by Roman conquerors. (Personally I would give more credit to older
indigenous forms than you seem willing to do.....more later)
Now I'd like to challenge the way you phrase your question. I assume
that you are a well-intentioned person with a simple curiosity,
Therefore I will respond in a friendly manner.
The fact is that "architecture" ...especially in its most "elevated"
and 'honorific" forms..... is the true and honest manifestation of how
a particular culture has chosen to build in response to place, time,
technology and culture. Actually, technology is merely one aspect of
culture if you consider it from the anthropological sense. My point is
really simple. Stop trying to look beyond the "indigenous" achitecture
if you want to understand the "honorific" architecture of England or
any other place.
For instance....it is well known that most of the pre-hispanic temples
of Mesoamerica were built as small temple shelters on a great mound.
Naturally you could talk about this from a purely formal approach...and
the result would be merely formal observations. Or you could visit the
Mexican states of Vercruz, Tabasco, Yucatan, and see that ...especially
in the lower tidal flats.....the predominant way of building....from
the pre-historic era until today....is to build on a mound....in order
to avoid floodwaters. This means that for the earliest advanced
civilizations of Mexico....in La Venta.....the natural way to build was
to put a small house on a raised earthen mound. This forms the basis
for what later civilizations would build at Teotihuacan, Tenochtitlan,
Tula, Monte Alban, Chichen Itza and the rest.
In closing....I ask you to shift your focus to embrace and understand
the "old stone huts built by peasants/farmers" and look there for the
seeds of the profound architectures that would follow. Certainly, no
Brit would accept the idea that only a bunch of marauding Italians
could bring "architecture" to the British Isles!!!!
Remember the observation of Adolf Loos.... "the architect is a mason
who speaks Latin"
San Antonio, Texas y Mexico City