First of all, a number of official family photographs showing the whole family united...
Above, you can see Nicholas, Alexandra and their two baby daughters Olga and Tatiana in 1898.
Above: The whole imperial family poses very formally in 1906. You can see Tatiana on the right, next to her father.
Above: Same year, the family aboard the Standart. Tatiana stands on the far right.
A few years later, on the Standart again. Tatiana just behind her mother.
Very informal snapshoot showing the imperial family during their daily breakfast inside the dinning room of the Alexanderpalace.
A formal photograph which was published in all russian newspapers when the Millenium was celebrated in 1913. Tatiana stands behind her mother on it.
A newspaper image which has captured a little peace of "imperial glory". You can see Tatiana on the far right.
Some photos of the five imperial children posing together...
On the left, you can see "OTMAA" in 1906, Tatiana holding hands with Maria and surrounded by Olga with Alexei and Anastasia.
Above a wonderful snapshoot which really captures the happiness the children felt aboard the Standart. Tatiana has taken Alexei and Anastasia by the hand and smiles most brightly on it.
Little cuties in the summer of 1908.
Fun in the snow, playing in the garden of the Alexanderpalace... Tatiana stands on the far left.
Above: Beautiful portrait of the five children, and Tanya (far left) smiles charmingly on it, 1910. :)
Above: Still 1910, Tatiana studies a book.
Most probably taken on that same day: clockwise from left Maria, Olga, Alexei, Anastasia, Tatiana.
"OTMA" in the Mauve Boudoir of their mother which is considered as the most famous room inside the Alexanderpalace. Tatiana's sitting on the right, just in front of the window.
The imperial children in court dresses. Tatiana stands behind her siblings, wrapping her arm around Maria.
The Tsar's children. As you see, Tatiana's the second girl from the left.
Now, let's have a look at photos of Olga, Tatiana, Maria and Anastasia...
OTMA in 1906. (Tanya second from left.) One picture from a hauntingly beautiful series.
Part two of that same series.
... and finally part three.
Tatiana (secod from right) and her sisters having fun with mini-pony.
The girls inside the famous Mauve boudoir of their mother. You'll discover Tatiana right in the middle of the picture.
A snapshoot which gives us an idea of the happiness these carefree girls always felt while sailing aboard the Standart along the coast.
Happily laughing at the beach... Tatiana's the second from left.
The imperial sisters in 1914, once again a part of a large series. Tatiana stands, looking into the album.
The girls shortly before the abdication of their father in winter 1916/17. Tatiana is seated on the far right, chatting with Olga.
Pictures of the Big Pair, of Tatiana and her favorite sister Olga...
Merry children playing in the garden.
The little girls in court dresses, holding each other's hand (1904).
Looking over the sea, possibly 1908.
Relaxing under huge sun hats.
Ready for a bit of horsebackriding.
Long summers aboard the Standart.
Very famous sitting in 1914. Tatiana is standing in front of Olga.
Seated next to each other.
Surrounded by fresh flowers.
Nursing during the sad months of WW1. Tatiana and Olga signed this picture personally.
Young Grand Duchesses.
"Tatia and Olishka"
Tatiana and her parents...
´Tennis afternoons with her father (photo taken around 1914)
A walk in the woods, lookig for flowers.
The tsar and his daughter shortly before becoming prisoners. Tatiana's leaning softly on her father here.
Tatiana's always been some sort of "Mama's girl"...
Looking through some old photographs.
It looks like she's sharing secrets with "darling Mama". :)
Empress Alexandra surrounded by her daughters...
A walk in the garden. Tatiana stands just right from her mother.
Near the Crimean Coast, it looks like the girls are just chatting and gigling with their mother.
AOTMA united in the Mauve boudoir. Clockwise from left Olga, Tatiana, Alexandra, Anastasia and in front of the others Maria.
Alexandra receives some visitors "at home", in her appartement of the Alexanderpalace. (Have a look at all the private family photographs which cover the wall!) Tatiana (far right) seems to be merry and amused.
A snapshoot outside: Clockwise from left Tatiana. Maria, Olga, Anastasia and - in front of her daughters - Alexandra.
Alexandra (m.) and her daughters during their work in the hospitals of Petrograd. Tatiana and Olga wear - just like their mother does - the dress of a Red Cross nurse.
Widely known portrait of Alexandra and her daughters, taken around 1915.
Alexandra and daughters a short time before the outbreak of the February revolution in Russia. One can see clearly that Tatina carries a boxcamera in this photo.
Some snapshoots of Tatiana with her younger sisters
Tatiana (on the right hand) and Maria nursing the ship cats.
The two sisters some years later on horses.
It must have been an especially tiring day... Maria's sleeping on Tatiana's lap on this snapshoot.
Tatiana (left) and Anastasia during the formal sitting in 1910.
1917, enjoying the nature. Tanya is holding Ortino in her arms, the bulldog her admirer Dmitri Malama gave to her some time before.
From left to right Anastasia, Maria and Tatiana. This photograph was taken towards the end of the summer of 1917.
Tatiana and her only brother
Tatiana and her little brother Alexei.
Brother and sister a couple of years later, according to some sources during a visit at the military camp "Stavka" where they met their father.
This photo captures the nearly exotic site of Tanya's aspect very clearly. Alexei is standing in the background.
I'll add more pictures from time to time, please be patient...