INTRODUCTION
9
infullmeasure,satisfy
themall. And,
intheabsence
ofsuch
aprinciple,itisquitearbitraryto
pronounce
dogmatically on the concessions which art should
make
to
science
orutility. Unlessitcanbeproved
that theseapparentlydifferentvalues arein reality
commensurable, there ought to be three separate
schemesofcriticism: thefirstbasedonconstruction,
the second on convenience, the third on aesthetics.
Each could be rational, complete, and, within its
own province, valid.
Thus by degrees
might
be
obtained what at present is certainly lacking
—
^the
data foratheory ofarchitecture which should not
becontradicted
at
once
bythehistoryoftaste.
Thepresentstudyseekstoexplainonechapterof
that history. It deals with a
limited period
of
architecture,fromasinglepointofview.
Theperiodisonewhichpresentsacertainobvious
unity. Itextendsfromtherevivalof
classicalforms
atthehandsofBrunelleschi,inthefifteenth
century,
to
theriseoftheGothic
movement,bywhich, four
hundred years later, they were eclipsed.
The old
medisevalism, andthe new, marktheboundaries
of
oursubject. Atnopointin
thefourcenturieswhich
interveneddoesany
lineofcleavageoccuras
distinct
as those whichsever the
historyofarchitecture
at
these two points.